3 afsd, afsd.fuse - Initializes the Cache Manager and starts related daemons
10 B<afsd> [B<-afsdb>] [B<-backuptree>]
11 S<<< [B<-biods> <I<number of bkg I/O daemons (aix vm)>>] >>>
12 S<<< [B<-blocks> <I<1024 byte blocks in cache>>] >>>
13 S<<< [B<-cachedir> <I<cache directory>>] >>>
14 S<<< [B<-chunksize> <I<log(2) of chunk size>>] >>>
15 S<<< [B<-confdir> <I<configuration directory>>] >>>
16 S<<< [B<-daemons> <I<number of daemons to use>>] >>>
17 S<<< [B<-dcache> <I<number of dcache entries>>] >>> [B<-debug>]
18 [B<-dynroot>] [B<-dynroot-sparse>] [B<-enable_peer_stats>]
19 [B<-enable_process_stats>] [B<-fakestat>] [B<-fakestat-all>]
20 S<<< [B<-files> <I<files in cache>>] >>>
21 S<<< [B<-files_per_subdir> <I<log(2) of files per dir>> ] >>>
22 [B<-help>] S<<< [B<-logfile> <I<Place to keep the CM log>>] >>>
23 [B<-mem_alloc_sleep>] [B<-memcache>]
24 S<<< [B<-mountdir> <I<mount location>>] >>> [B<-nomount>]
26 S<<< [B<-prealloc> <I<number of 'small' preallocated blocks>>] >>>
27 [B<-rmtsys>] S<<< [B<-rootvol> <I<name of AFS root volume>>] >>>
28 [B<-rxbind>] S<<< [B<-rxmaxmtu> value for maximum MTU ] >>>
29 S<<< [B<-rxpck> value for rx_extraPackets ] >>>
30 [B<-settime>] [B<-shutdown>]
31 S<<< [B<-splitcache> <I<RW/RO ratio>>] >>>
32 S<<< [B<-stat> <I<number of stat entries>>] >>> [B<-verbose>]
33 [B<-disable-dynamic-vcaches>]
34 S<<< [B<-volumes> <I<number of volume entries>>] >>>
35 [B<-waitclose>] [B<-rxmaxfrags> <I<max # of fragments>>]
42 The B<afsd> command initializes the Cache Manager on an AFS client machine
43 by transferring AFS-related configuration information into kernel memory
44 and starting several daemons. B<afsd.fuse> is an experimental variant that
45 initializes a FUSE-based Cache Manager instead of one based on a kernel
48 The B<afsd> command performs the following actions:
54 Sets a field in kernel memory that defines the machine's cell
55 membership. Some Cache Manager-internal operations and system calls
56 consult this field to learn which cell to execute in. (The AFS command
57 interpreters refer to the F</usr/vice/etc/ThisCell> file instead.) This
58 information is transferred into the kernel from the
59 F</usr/vice/etc/ThisCell> file and cannot be changed until the B<afsd>
64 Places in kernel memory the names and Internet addresses of the database
65 server machines in the local cell and (optionally) foreign cells. The
66 appearance of a cell's database server machines in this list enables the
67 Cache Manager to contact them and to access files in the cell. Omission of
68 a cell from this list, or incorrect information about its database server
69 machines, prevents the Cache Manager from accessing files in it.
71 By default, the list of database server machines is transferred into the
72 kernel from the F</usr/vice/etc/CellServDB> file. Alternatively, when the
73 B<-afsdb> option is used, the list of database server machines is taken
74 from the DNS SRV or AFSDB records for each cell. After initialization, use the
75 B<fs newcell> command to change the kernel-resident list without having to
80 Mounts the root of the AFS filespace on a directory on the machine's local
81 disk, according to either the first field in the
82 F</usr/vice/etc/cacheinfo> file (the default) or the B<afsd> command's
83 B<-mountdir> argument. The conventional value is F</afs>.
87 Determines which volume to mount at the root of the AFS file tree. The
88 default is the volume C<root.afs>; use the B<-rootvol> argument to
89 override it. Although the base (read/write) form of the volume name is the
90 appropriate value, the Cache Manager has a bias for accessing the
91 read-only version of the volume (by convention, C<root.afs.readonly>) if
96 Configures the cache on disk (the default) or in machine memory if the
97 B<-memcache> argument is provided. In the latter case, the B<afsd> program
98 allocates space in machine memory for caching, and the Cache Manager uses
99 no disk space for caching even if the machine has a disk.
103 Defines the name of the local disk directory devoted to caching, when the
104 B<-memcache> argument is not used. If necessary, the B<afsd> program
105 creates the directory (its parent directory must already exist). It does
106 not remove the directory that formerly served this function, if one
109 The second field in the F</usr/vice/etc/cacheinfo> file is the source for
110 this name. The standard value is F</usr/vice/cache>. Use the B<-cachedir>
111 argument to override the value in the B<cacheinfo> file.
115 Sets the size of the cache. The default source for the value is the third
116 field in the F</usr/vice/etc/cacheinfo> file, which specifies a number of
119 For a memory cache, the following arguments to the afsd command override
120 the value in the B<cacheinfo> file:
126 The B<-blocks> argument, to specify a different number of kilobyte blocks.
130 The B<-dcache> and B<-chunksize> arguments together, to set both the
131 number of dcache entries and the chunk size (see below for definition of
132 these parameters). In this case, the B<afsd> program derives cache size by
133 multiplying the two values. Using this combination is not recommended, as
134 it requires the issuer to perform the calculation beforehand to determine
135 the resulting cache size.
139 The B<-dcache> argument by itself. In this case, the B<afsd> program
140 derives cache size by multiplying the value specified by the B<-dcache>
141 argument by the default memory cache chunk size of eight kilobytes. Using
142 this argument is not recommended, as it requires the issuer to perform the
143 calculation beforehand to determine the resulting cache size.
147 For satisfactory memory cache performance, the specified value must leave
148 enough memory free to accommodate all other processes and commands that
149 can run on the machine. If the value exceeds the amount of memory
150 available, the B<afsd> program exits without initializing the Cache
151 Manager and produces the following message on the standard output stream:
153 afsd: memCache allocation failure at <number> KB
155 where <number> is how many kilobytes were allocated just before the
158 For a disk cache, use the B<-blocks> argument to the B<afsd> command to
159 override the value in the B<cacheinfo> file. The value specified in either
160 way sets an absolute upper limit on cache size; values provided for other
161 arguments (such as B<-dcache> and B<-chunksize>) never result in a larger
162 cache. The B<afsd> program rejects any setting larger than 95% of the
163 partition size, and exits after generating an error message on the
164 standard output stream, because the cache implementation itself requires a
165 small amount of disk space and overfilling the partition can cause the
166 client machine to panic.
168 To change the size of a disk cache after initialization without rebooting,
169 use the B<fs setcachesize> command; the setting persists until the B<afsd>
170 command runs again or the B<fs setcachesize> command is reissued. The B<fs
171 setcachesize> command does not work for memory caches.
175 Sets the size of each cache I<chunk>, and by implication the amount of
176 data that the Cache Manager requests at a time from the File Server (how
177 much data per fetch RPC, since AFS uses partial file transfer).
179 For a disk cache, a chunk is a F<VI<n>> file and this parameter sets the
180 maximum size to which each one can expand. For a memory cache, each chunk
181 is a collection of contiguous memory blocks. The default for a disk cache
182 is between 256 KB and 1 MB depending on the size of the cache. The default
183 for a memory cache is 8 KB.
185 To override the default chunk size for either type of cache, use the
186 B<-chunksize> argument to provide an integer to be used as an exponent of
187 two; see L</OPTIONS> for details. For a memory cache, if total cache size
188 divided by chunk size leaves a remainder, the B<afsd> program rounds down
189 the number of dcache entries, resulting in a slightly smaller cache.
193 Sets the number of chunks in the cache. For a memory cache, the number of
194 chunks is equal to the cache size divided by the chunk size. For a disk
195 cache, the number of chunks (F<VI<n>> files) is set to the largest
196 of the following unless the B<-files> argument is used to set the value
207 1.5 times the result of dividing cache size by chunk size
208 (I<cachesize>/I<chunksize> * 1.5)
212 The result of dividing cachesize by 10 KB (I<cachesize>/10240)
218 Sets the number of I<dcache entries> allocated in machine memory for
219 storing information about the chunks in the cache.
221 For a disk cache, the F</usr/vice/cache/CacheItems> file contains one
222 entry for each F<VI<n>> file. By default, one half the number of
223 these entries (but not more that 2,000) are duplicated as dcache entries
224 in machine memory for quicker access.
226 For a memory cache, there is no F<CacheItems> file so all information
227 about cache chunks must be in memory as dcache entries. Thus, there is no
228 default number of dcache entries for a memory cache; instead, the B<afsd>
229 program derives it by dividing the cache size by the chunk size.
231 To set the number of dcache entries, use the B<-dcache> argument; the
232 specified value can exceed the default limit of 2,000. Using this argument
233 is not recommended for either type of cache. Increasing the number of
234 dcache entries for a disk cache sometimes improves performance (because
235 more entries are retrieved from memory rather than from disk), but only
236 marginally. Using this argument for a memory cache requires the issuer to
237 calculate the cache size by multiplying this value by the chunk size.
241 Sets the number of I<stat> entries available in machine memory for caching
242 status information about cached AFS files. The default is based on the
243 size of the cache. Use the B<-stat> argument to override the default.
247 If the B<-settime> option is specified, then it randomly selects a file
248 server machine in the local cell as the source for the correct time. Every
249 five minutes thereafter, the local clock is adjusted (if necessary) to
250 match the file server machine's clock. This is not enabled by default. It
251 is recommended, instead, that the Network Time Protocol Daemon be used to
252 synchronize the time.
256 In addition to setting cache configuration parameters, the B<afsd> program
257 starts the following daemons. (On most system types, these daemons appear
258 as nameless entries in the output of the UNIX B<ps> command.)
264 One I<callback> daemon, which handles callbacks. It also responds to the
265 File Server's periodic probes, which check that the client machine is
270 One I<maintenance> daemon, which performs the following tasks:
276 Garbage collects obsolete data (for example, expired tokens) from kernel
285 Refreshes information from read-only volumes once per hour.
289 Does delayed writes for NFS clients if the machine is running the NFS/AFS
296 One I<cache-truncation> daemon, which flushes the cache when free space is
297 required, by writing cached data and status information to the File
302 One I<server connection> daemon, which sends a probe to the File
303 Server every few minutes to check that it is still accessible. If the
304 B<-settime> option is set, it also synchronizes the machine's clock
305 with the clock on a randomly-chosen file server machine. There is
306 always one server connection daemon.
310 One or more I<background> daemons that improve performance by pre-fetching
311 files and performing background (delayed) writes of saved data into AFS.
313 The default number of background daemons is two, enough to service at
314 least five simultaneous users of the machine. To increase the number, use
315 the B<-daemons> argument. A value greater than six is not generally
320 On some system types, one I<Rx listener> daemon, which listens for
325 On some system types, one I<Rx event> daemon, which reviews the Rx
326 system's queue of tasks and performs them as appropriate. Most items in
327 the queue are retransmissions of failed packets.
331 On machines that run AIX with virtual memory (VM) integration, one or more
332 I<VM> daemons (sometimes called I<I/O> daemons, which transfer data
333 between disk and machine memory. The number of them depends on the setting
334 of the B<-biods> and B<-daemons> arguments:
340 If the B<-biods> argument is used, it sets the number of VM daemons.
344 If only the B<-daemons> argument is used, the number of VM daemons is
345 twice the number of background daemons.
349 If neither argument is used, there are five VM daemons.
355 B<afsd.fuse> is a variant of B<afsd> that, instead of initializing a Cache
356 Manager implemented as a kernel module, initializes a FUSE-based AFS
357 client. FUSE (Filesystem in USErspace) is a Linux-only mechanism for
358 providing a file system through a purely user-space daemon without a
359 kernel module component. B<afsd.fuse> takes all of the same options as
362 This command does not use the syntax conventions of the AFS command
363 suites. Provide the command name and all option names in full.
367 Before using the B<-shutdown> parameter, use the standard UNIX B<umount>
368 command to unmount the AFS root directory (by convention, F</afs>). On
369 Linux, unloading the AFS kernel module and then loading it again before
370 restarting AFS after B<-shutdown> is recommended.
372 AFS has for years had difficulties with being stopped and restarted
373 without an intervening reboot. While most of these issues have been
374 ironed out, stopping and restarting AFS is not recommended unless
375 necessary and rebooting before restarting AFS is still the safest course
376 of action. This does not apply to Linux; it should be safe to restart the
377 AFS client on Linux without rebooting.
379 In contrast to many client-server applications, not all communication is
380 initiated by the client. When the AFS client opens a file, it registers a
381 callback with the AFS server. If the file changes, the server notifies the
382 client that the file has changed and that all cached copies should be
383 discarded. In order to enable full functionality on the AFS client,
384 including all command-line utilities, the following UDP ports must be open
385 on an firewalls between the client and the server:
388 cachemanager 7001/udp (OpenAFS client. Arla uses 4711/udp)
391 kaserver 7004/udp (not needed with Kerberos v5)
393 reserved 7006/udp (for future use)
396 Clients will also need to be able to contact your Kerberos KDC to
397 authenticate. If you are using B<kaserver> and B<klog>, you need to allow
398 inbound and outbound UDP on ports >1024 (probably 1024<port<2048 would
399 suffice depending on the number of simultaneous B<klog>s).
401 Be sure to set the UDP timeouts on the firewall to be at least twenty
402 minutes for the best callback performance.
404 B<afsd.fuse> was first introduced in OpenAFS 1.5.74. It is only available
405 if OpenAFS was built with the C<--enable-fuse-client> configure switch.
406 It should be considered experimental.
414 Enable afsdb support. This will use DNS to lookup the SRV or AFSDB records and
415 use that for the database servers for each cell instead of the values
416 in the F<CellServDB> file. This has the advantage of only needing to
417 update one set of DNS records to reconfigure the AFS clients for a new
418 database server as opposed to touching all of the clients, and also
419 allows one to access a cell without preconfiguring its database
420 servers in F<CellServDB>. The format of SRV records is defined in
421 RFC 5864, and the AFSDB record format is in RFC 1183.
425 Prefer backup volumes for mountpoints in backup volumes. This option means
426 that the AFS client will prefer to resolve mount points to backup volumes
427 when a parent of the current volume is a backup volume. This is similar to
428 the standard behaviour of preferring read-only volumes over read-write
429 volumes when the parent volume is a read-only volume.
431 =item B<-biods> <I<number of I/O daemons>>
433 Sets the number of VM daemons dedicated to performing I/O operations on a
434 machine running a version of AIX with virtual memory (VM) integration. If
435 both this argument and the B<-daemons> argument are omitted, the default
436 is five. If this argument is omitted but the B<-daemons> argument is
437 provided, the number of VM daemons is set to twice the value of the
438 B<-daemons> argument.
440 =item B<-blocks> <I<blocks in cache>>
442 Specifies the number of kilobyte blocks to be made available for caching
443 in the machine's cache directory (for a disk cache) or memory (for a
444 memory cache), overriding the default defined in the third field of the
445 F</usr/vice/etc/cacheinfo> file. For a disk cache, the value cannot exceed
446 95% of the space available in the cache partition. If using a memory
447 cache, do not combine this argument with the B<-dcache> argument, since
448 doing so can possibly result in a chunk size that is not an exponent of 2.
450 =item B<-cachedir> <I<cache directory>>
452 Names the local disk directory to be used as the cache. This value
453 overrides the default defined in the second field of the
454 F</usr/vice/etc/cacheinfo> file.
456 =item B<-chunksize> <I<chunk size>>
458 Sets the size of each cache chunk. The integer provided, which must be
459 from the range C<0> to C<30>, is used as an exponent on the number 2. If not
460 supplied, a default chunksize will be determined based on the cache type and
461 cache size, and will range from C<13> (8KB) for memory cache and C<18> to
462 C<20> (256 KB to 1MB) for disk cache. A value of C<0> or less, or greater than
463 C<30>, sets chunk size to the appropriate default. Values less than C<10>
464 (which sets chunk size to a 1 KB) are not recommended. Combining this
465 argument with the B<-dcache> argument is not recommended because it
466 requires that the issuer calculate the cache size that results.
468 B<-chunksize> is an important option when tuning for performance. Setting
469 this option to larger values can increase performance when dealing with
472 =item B<-confdir> <I<configuration directory>>
474 Names a directory other than the F</usr/vice/etc> directory from which to
475 fetch the F<cacheinfo>, F<ThisCell>, and F<CellServDB> configuration
478 =item B<-daemons> <I<number of daemons to use>>
480 Specifies the number of background daemons to run on the machine. These
481 daemons improve efficiency by doing prefetching and background writing of
482 saved data. This value overrides the default of C<2>, which is adequate
483 for a machine serving up to five users. Values greater than C<6> are not
484 generally more effective than C<6>.
486 Note: On AIX machines with integrated virtual memory (VM), the number of
487 VM daemons is set to twice the value of this argument, if it is provided
488 and the B<-biods> argument is not. If both arguments are omitted, there
491 =item B<-dcache> <I<number of dcache entries>>
493 Sets the number of dcache entries in memory, which are used to store
494 information about cache chunks. For a disk cache, this overrides the
495 default, which is 50% of the number of F<VI<n>> files (cache chunks). For
496 a memory cache, this argument effectively sets the number of cache chunks,
497 but its use is not recommended, because it requires the issuer to
498 calculate the resulting total cache size (derived by multiplying this
499 value by the chunk size). Do not combine this argument with the B<-blocks>
500 argument, since doing so can possibly result in a chunk size that is not
505 Generates a highly detailed trace of the B<afsd> program's actions on the
506 standard output stream. The information is useful mostly for debugging
511 The standard behaviour of the AFS client without the B<-dynroot> option is
512 to mount the root.afs volume from the default cell on the F</afs> path. The
513 F</afs> folder and root.afs volume traditionally shows the folders for
514 F<ThisCell> and other cells as configured by the AFS cell administrator.
516 The B<-dynroot> option changes this. Using this option, the AFS client
517 does not mount the root.afs volume on F</afs>. Instead it uses the
518 contents of the F<CellServDB> file to populate the listing of cells in
519 F</afs>. This is known as a DYNamic ROOT. A cell is not contacted until
520 the path F</afs/I<cellname>> if accessed. This functions similarly to an
521 automounter. The main advantage of using B<-dynroot> is that the AFS
522 client will start properly even without network access, whereas the client
523 not using B<-dynroot> will freeze upon startup if cannot contact the
524 default cell specified in F<ThisCell> and mount the root.afs
525 volume. Dynamic root mode is also sometimes called travelling mode because
526 it works well for laptops which don't always have network connectivity.
528 Two advantages of not using dynroot are that listing F</afs> will usually
529 be faster because the contents of F</afs> are limited to what the AFS
530 administrator decides and that symbolic links are traditionally created
531 by the AFS administrator to provide a short name for the cell (i.e.
532 cellname.domain.com is aliased to cellname). However, with dynroot, the
533 local system administrator can limit the default contents of F</afs> by
534 installing a stripped-down F<CellServDB> file, and if dynroot is in effect,
535 the F<CellAlias> file can be used to provide shortname for common AFS cells
536 which provides equivalent functionality to the most commonly used symbolic
539 =item B<-dynroot-sparse>
541 In addition to operating in the manner described for dynroot above,
542 cells other than the local cell are not shown by default until a lookup
543 occurs. Cell aliases as set in the CellAliases file are shown as normal,
544 although they may appear to be dangling links until traversed.
546 =item B<-enable_peer_stats>
548 Activates the collection of Rx statistics and allocates memory for their
549 storage. For each connection with a specific UDP port on another machine,
550 a separate record is kept for each type of RPC (FetchFile, GetStatus, and
551 so on) sent or received. To display or otherwise access the records, use
552 the Rx Monitoring API.
554 =item B<-enable_process_stats>
556 Activates the collection of Rx statistics and allocates memory for their
557 storage. A separate record is kept for each type of RPC (FetchFile,
558 GetStatus, and so on) sent or received, aggregated over all connections to
559 other machines. To display or otherwise access the records, use the Rx
564 Return fake values for stat calls on cross-cell mounts. This option makes
565 an C<ls -l> of F</afs> much faster since each cell isn't contacted, and
566 this and the B<-fakestat-all> options are useful on Mac OS X so that the
567 Finder program doesn't try to contact every AFS cell the system knows
570 Note that, for the purposes of B<-fakestat>, local cellular mounts count
571 as "cross-cell" mounts. That is, if the local cell is C<localcell>, a
572 mount for C<localcell:root.cell> will count as a "cross-cell" mount and
573 so stat calls for it will be faked with B<-fakestat>. In practice, local
574 cellular mounts are rare and generally discouraged, so this should not
575 generally make a difference.
577 =item B<-fakestat-all>
579 Return fake values for stat calls on all mounts, not just cross-cell
580 mounts. This and the B<-fakestat> options are useful on Mac OS X so that
581 the Finder program doesn't hang when browsing AFS directories.
583 =item B<-files> <I<files in cache>>
585 Specifies the number of F<VI<n>> files to create in the cache directory
586 for a disk cache, overriding the default that is calculated as described
587 in L</DESCRIPTION>. Each F<VI<n>> file accommodates a chunk of data, and
588 can grow to a maximum size of 64 KB by default. Do not combine this
589 argument with the B<-memcache> argument.
591 =item B<-files_per_subdir> <I<files per cache subdirectory>>
593 Limits the number of cache files in each subdirectory of the cache
594 directory. The value of the option should be the base-two log of the
595 number of cache files per cache subdirectory (so 10 for 1024 files, 14 for
596 16384 files, and so forth).
600 Prints the online help for this command. All other valid options are
603 =item B<-logfile> <I<log file location>>
605 This option is obsolete and no longer has any effect.
607 =item B<-mem_alloc_sleep>
609 This option is obsolete and no longer has any effect.
613 Initializes a memory cache rather than a disk cache. Do not combine this
614 flag with the B<-files> argument.
616 =item B<-mountdir> <I<mount location>>
618 Names the local disk directory on which to mount the root of the AFS
619 filespace. This value overrides the default defined in the first field of
620 the F</usr/vice/etc/cacheinfo> file. If a value other than the F</afs>
621 directory is used, the machine cannot access the filespace of cells that
626 Do not mount AFS on startup. The afs global mount must be mounted via
627 some other means. This is useful on Mac OS X where /afs is sometimes
628 mounted in /Network/afs like other network file systems.
632 This is enabled by default. It prevents the Cache Manager from
633 synchronizing its clock with the clock on a server machine selected at
634 random by checking the time on the server machine every five minutes.
635 This is the recommended behavior; instead of the AFS Cache Manager, the
636 Network Time Protocol Daemon should be used to synchronize the system
639 =item B<-prealloc> <I<number of preallocated blocks>>
641 Specifies the number of pieces of memory to preallocate for the Cache
642 Manager's internal use. The default initial value is C<400>, but the Cache
643 Manager dynamically allocates more memory as it needs it.
647 Initializes an additional daemon to execute AFS-specific system calls on
648 behalf of NFS client machines. Use this flag only if the machine is an
649 NFS/AFS translator machine serving users of NFS client machines who
650 execute AFS commands.
652 =item B<-rootvol> <I<name of AFS root volume>>
654 Names the read/write volume corresponding to the root directory for the
655 AFS file tree (which is usually the F</afs> directory). This value
656 overrides the default of the C<root.afs> volume. This option is ignored if
657 B<-dynroot> is given.
661 Bind the Rx socket (one interface only).
663 =item B<-rxmaxfrags> <I<max # of fragments>>
665 Set a limit for the maximum number of UDP fragments Rx will send per Rx
666 packet, and the maximum number of fragments Rx thinks it can receive when
667 advertising its receive size to peers. Practically speaking, setting this
668 option means that you will not see Rx data packets that are broken into more
669 than N fragments, where N is the value specified for this option. Setting this
670 option to 1 effectively prevents fragmentation, and can be useful when dealing
671 with networking equipment that does not properly handle UDP fragments.
673 Note that this option just specifies a maximum. The actual number of fragments
674 seen on the wire may be less than what is specified, depending on the
675 configuration of the peer.
677 =item B<-rxmaxmtu> <I<value for maximum MTU>>
679 Set a limit for the largest maximum transfer unit (network packet size) that
680 the AFS client on this machine will be willing to transmit. This switch can
681 be used where an artificial limit on the network precludes packets as large
682 as the discoverable MTU from being transmitted successfully.
684 =item B<-rxpck> <I<value for rx_extraPackets>>
686 Set rx_extraPackets to this value. This sets the number of extra Rx
687 packet structures that are available to handle Rx connections. This
688 value should be increased if the "rxdebug 127.0.0.1 -port 7001
689 -rxstats" command shows no free Rx packets. Increasing this value may
690 improve OpenAFS client performance in some circumstances.
694 Enable native AFS time synchronization. This option is the opposite of
695 B<-nosettime> and cannot be used with the B<-nosettime> option.
699 Shuts down the Cache Manager. Before calling B<afsd> with this option,
700 unmount the AFS file system with B<umount>.
702 =item B<-splitcache> <I<RW/RO Ratio>>
704 This allows the user to set a certain percentage of the AFS cache be
705 reserved for read/write content and the rest to be reserved for read-only
706 content. The ratio should be written as a fraction. For example,
707 C<-splitcache 75/25> devotes 75% of your cache space to read/write content
708 and 25% to read-only.
710 =item B<-stat> <I<number of stat entries>>
712 Specifies the number of entries to allocate in the machine's memory for
713 recording status information about the AFS files in the cache. If this value
714 is not specified, the number of stat entires will be autotuned based on the
715 size of the disk cache.
719 Generates a detailed trace of the B<afsd> program's actions on the
720 standard output stream.
722 =item B<-volumes> <I<number of volume entries>>
724 Specifies the number of memory structures to allocate for storing volume
725 location information. The default value is C<200>.
727 =item B<-disable-dynamic-vcaches>
729 By default, dynamic vcache overrides the B<-stat> option by using the value of
730 B<-stat> (or the default) as the initial size of the stat (or vcache) pool and
731 increases the pool dynamically as needed on supported platforms. This flag will
732 disable this new functionality and honor the '-stat' setting.
736 Has no effect on the operation of the Cache Manager. The behavior it
737 affected in previous versions of the Cache Manager, to perform synchronous
738 writes to the File Server, is now the default behavior. To perform
739 asynchronous writes in certain cases, use the B<fs storebehind> command.
745 The B<afsd> command is normally included in the machine's AFS
746 initialization file, rather than typed at the command shell prompt. For
747 most disk caches, the appropriate form is
751 The following command is appropriate when enabling a machine to act as an
752 NFS/AFS Translator machine serving more than five users.
754 % /usr/vice/etc/afsd -daemons 4 -rmtsys
756 The following command initializes a memory cache and sets chunk size to 16
759 % /usr/vice/etc/afsd -memcache -chunksize 14
761 =head1 PRIVILEGE REQUIRED
763 The issuer must be logged in as the local superuser root.
772 RFC 5864 L<http://www.ietf.org/rfc/rfc5864.txt>
773 RFC 1183 L<http://www.ietf.org/rfc/rfc1183.txt>
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779 This documentation is covered by the IBM Public License Version 1.0. It
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781 Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.