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Top Forums UNIX for Beginners Questions & Answers Single LUN or multiple smaller LUNs for NFS sharing Post 302994806 by Peasant on Tuesday 28th of March 2017 10:49:30 AM
Old 03-28-2017
If you are using FC disks for that NFS server, i would advise using multiple luns.
Just add additional 3 x 1.5 TB, making it 4 x 1.5 TB zpool

ZFS will stripe the load (it's raid0 basically) across all disks in zpool.

With one monster lun you could hit queue depth problems.
One lun has final queue depth on storage side, afaik, regardless of the manufacturer.

On Solaris 11 the default queue depth is 256, which seems quite high for default, but applicable under some loads.

This won't be so noticeable on SSD or FMC modules, but doubtful you are using those for backups via NFS.
So i would go multiple luns same size as the first one you added in your situation.

Hope that helps
Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
 

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share(1M)																 share(1M)

NAME
share - make local resource available for mounting by remote systems SYNOPSIS
share [-F FSType] [-o specific_options] [-d description] [pathname] The share command exports, or makes a resource available for mounting, through a remote file system of type FSType. If the option -F FSType is omitted, the first file system type listed in /etc/dfs/fstypes is used as default. For a description of NFS specific options, see share_nfs(1M). pathname is the pathname of the directory to be shared. When invoked with no arguments, share displays all shared file sys- tems. -F FSType Specify the filesystem type. -o specific_options The specific_options are used to control access of the shared resource. (See share_nfs(1M) for the NFS specific options.) They may be any of the following: rw pathname is shared read/write to all clients. This is also the default behavior. rw=client[:client]... pathname is shared read/write only to the listed clients. No other systems can access pathname. ro pathname is shared read-only to all clients. ro=client[:client]... pathname is shared read-only only to the listed clients. No other systems can access pathname. Separate multiple options with commas. Separate multiple operands for an option with colons. See . -d description The -d flag may be used to provide a description of the resource being shared. Example 1: Sharing a Read-Only Filesystem This line will share the /disk file system read-only at boot time. share -F nfs -o ro /disk Example 2: Invoking Multiple Options The following command shares the filesystem /export/manuals, with members of the netgroup having read-only access and users on the speci- fied host having read-write access. share -F nfs -o ro=netgroup_name,rw=host1:host2:host3 /export/manuals /etc/dfs/dfstab list of share commands to be executed at boot time /etc/dfs/fstypes list of file system types, NFS by default /etc/dfs/sharetab system record of shared file systems See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ mountd(1M), nfsd(1M), share_nfs(1M), shareall(1M), unshare(1M), attributes(5) Export (old terminology): file system sharing used to be called exporting on SunOS 4.x, so the share command used to be invoked as exportfs(1B) or /usr/sbin/exportfs. If share commands are invoked multiple times on the same filesystem, the last share invocation supersedes the previous--the options set by the last share command replace the old options. For example, if read-write permission was given to usera on /somefs, then to give read- write permission also to userb on /somefs: example% share -F nfs -o rw=usera:userb /somefs This behavior is not limited to sharing the root filesystem, but applies to all filesystems. 9 Dec 2004 share(1M)
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