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Multistore max_mpx

Hi!

I am trying to understand how the max_mpx setting should be handled when having multiple vfilers.

In a Citrix environment this should be increased, but it looks like the "Max Multiplex" from the "cifs stat"

command are higher than the cifs.max_mpx setting.

Are this somehow shared between vfilers, or do each vfiler have their own separate mecanism for this?

I have seen recomendations to set it high initially (1124) when running Citrix, and others wants to fine

tune..

Has vfiler0 max_mpx setting any influence on the vfilers?'

/Sjalla

Multistore max_mpx

The max_mpx setting is set separately per vFiler.  The setting in vfiler0 does not affect non-default vfilers.

http://now.netapp.com/NOW/knowledge/docs/ontap/rel801/html/ontap/cmdref/man1/na_options.1.htm

cifs.max_mpx
This option controls how many simultaneous operations the filer reports that it can process. An "operation" is each I/O the client believes is pending on the filer including outstanding change notify operations. Clients such as Windows Terminal Server or IIS may require that this number be increased to avoid errors and performance delays.

CAUTION - The approved values for this parameter are 50, 126, 253, and 1124. The most accurate way to determine which number to use is to measure the Redirector-Current Commands statistic on the client with NT perfmon and to increase the number until Current Commands does not hit the negotiated limit. For more information see Microsoft Knowledge Base articles Q191370 and Q232890.

CAUTION - This number should only be changed while cifs is terminated.

CAUTION - Only use the approved values to avoid Q232890.

CAUTION - This value affects allocations in the clients. Use the smallest value necessary for correct behavior.

Default: 50

Values: 50, 126, 253, 1124

Effective: Immediately

Persistence: Remains in effect across system reboots

VFILER CONSIDERATIONS

Each vfiler has its own set of options. Vfilers, however, recognize only a subset of the options recognized by a filer. The list of options recognized by a vfiler are:

Each vfiler has its own set of options. Vfilers, however, recognize only a subset of the options recognized by a filer. The list of options recognized by a vfiler are:

  cifs.audit.enable

  cifs.audit.file_access_events.enable

  cifs.audit.logon_events.enable

  cifs.audit.logsize

  cifs.audit.saveas

  cifs.bypass_traverse_checking

  cifs.comment

  cifs.guest_account

  cifs.home_dir_namestyle

  cifs.homedirs_public_for_admin

  cifs.idle_timeout

  cifs.max_mpx

  cifs.netbios_aliases

  cifs.netbios_over_tcp.enable

  cifs.nfs_root_ignore_acl

  cifs.oplocks.enable

  cifs.oplocks.opendelta

  cifs.perm_check_ro_del_ok

  cifs.perm_check_use_gid

  cifs.preserve_unix_security

  cifs.restrict_anonymous.enable

  cifs.save_case

  cifs.scopeid

  cifs.search_domains

  cifs.show_snapshot

  cifs.shutdown_msg_level

  cifs.sidcache.enable

  cifs.sidcache.lifetime

  cifs.snapshot_file_folding.enable

  cifs.symlinks.cycleguard

  cifs.symlinks.enable

  cifs.trace_login

  cifs.universal_nested_groups.enable

  dns.domainname

  dns.enable

  ndmpd.access

  ndmpd.authtype

  ndmpd.connectlog.enabled

  ndmpd.enable

  ndmpd.ignore_ctime.enabled

  ndmpd.password_length

  nfs.mount_rootonly

  nfs.per_client_stats.enable

  nfs.require_valid_mapped_uid

  nfs.tcp.enable

  nfs.udp.xfersize

  nfs.v2.df_2gb_lim

  nfs.v3.enable

  nfs.webnfs.enable

  nfs.webnfs.rootdir

  nfs.webnfs.rootdir.set

  nis.domainname

  nis.enable

  nis.group_update.enable

  nis.group_update_schedule

  nis.servers

  nis.slave.enable

  pcnfsd.enable

  pcnfsd.umask

  rsh.access

  rsh.enable

  security.passwd.rules.enable

  snapmirror.enable

  snapmirror.checkip.enable

  snapmirror.access

  snapvault.access

  snapvault.enable

  wafl.default_nt_user

  wafl.default_unix_user

  wafl.nt_admin_priv_map_to_root

  wafl.wcc_max_entries

  wafl.wcc_minutes_valid

These options only affect the operation of the concerned vfiler. When run in the context of a vfiler, (e.g. via the vfiler run command), the options command only prints the options recognized by a vfiler, and can only change these options.

Multistore max_mpx

Thanks!

Now I see from the 8.0.1 Release notes that the default cifs.max_mpx value has changed to 255??

http://now.netapp.com/NOW/knowledge/docs/ontap/rel801/html/ontap/rnote/GUID-134FBB03-7323-474B-A0C5-3399CA43D737.html

How does this compute, are there also new rules for the default values?

How does this relate to vfilers (and vfiler0)?

Lots of questions :-)

Regards

/Sjalla