Universe tends to make it's IO requests in 4K blocks, so you may want to make
sure you're not sharing spindles with things like sharepoint, where a typical
disk read request is more like 500K. You could end up with a 4K read waiting on
something 100 times larger as a regular thing. In AIX, it's a great idea to
increase RAM so that your cache hit rate is very high. With the lrud approach,
you can get very high %'s.
> From: [email protected]
> To: [email protected]
> Date: Tue, 2 Jul 2013 13:12:06 -0700
> Subject: Re: [U2] SAN?
>
> Ty,
>
> We have run 2 good sized Solaris boxes and 1 medium one over paired 1Gb
> switches for a long time ~ 5-600 users, thousands of files. Bandwidth is not
> a problem. We do run a separate network for SAN access from the servers. As
> a practical matter, this works. We are upgrading the switches to 10Gb, but
> we are by no means saturated.
>
> Solaris supports an "llock" or local lock option on NFS mounts which
> circumvents some of the performance issues mentioned in Aaron's message. I
> think that there is a similar solution for Linux boxes.
>
> rw,bg,vers=3,proto=tcp,hard,intr,rsize=32768,wsize=32768,llock
>
> This may not apply with your SAN. But if you can move some stuff over and
> test it, it is definitely worth the effort. Is NFS slower that a local disk?
> Likely so, right up until you have a disk failure, have to restore from tape
> instead of a snapshot, or fsck 500 Gigs. Is performance very good anyway?
> Yes. If a SAN can handle the average Microsoft product & output, U2's text
> based data cannot be all that difficult. ("hello world" in msword is worth 5
> groups in UV.) I apologize for the evangelical bent.
>
> There are doubtlessly architectural solutions other than NFS mounts, and some
> may be appropriate to your hardware and applications. NFS can be quite
> simple and surprisingly robust.
>
> -Rick
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Ty Haller
> Sent: Tuesday, July 02, 2013 10:50 AM
> To: 'U2 Users List'
> Subject: Re: [U2] SAN?
>
> Thanks.
>
> I'm aware of the advantages. I was more concerned with the IO requirements
> and how that would impact shared storage.
>
>
>
> Ty Haller
> SEFCU
> Lead Administrator - System Services
> [email protected]
>
> > -----Original Message-----
> > From: [email protected] [mailto:u2-users-
> > [email protected]] On Behalf Of Rick Nuckolls
> > Sent: Tuesday, July 02, 2013 11:13 AM
> > To: '[email protected]'
> > Subject: Re: [U2] SAN?
> >
> > Ty,
> >
> > We have used a NetApps SAN for a number of years with Solaris for Universe
> > data. (For Universe) there is the obvious tweak of allowing direct access
> > to
> > NFS, and depending on the type of SAN, there are probably some mount options
> > to optimize the throughput. It also helps to have a fair amount of memory
> > for
> > file caching, but it works great and provides many important advantages. A
> > couple of caveats: Do not allow access to snapshots through the same NFS
> > mount as the primary data. For NetApps, at least, the snapshot has the same
> > inode as the live data file, so the snapshot tree must be mounted as a
> > separate
> > device to avoid confusing (Universe) with conflicting file headers and
> > data. NFS
> > mounts work fine, as long as access to a particular directory tree is
> > managed
> > by a single data server.
> >
> > Oracle supports this same configuration, though I do not think that Rocket
> > has
> > much experience with it.
> >
> > Although difficult, it is possible to install Universe a SAN, and then run
> > it on a
> > VM, which means that you can snapshot almost all of the UV environment at
> > once!
> >
> > Rick Nuckolls
> > Lynden Inc
> >
> >
> >
> > -----Original Message-----
> > From: [email protected] [mailto:u2-users-
> > [email protected]] On Behalf Of Ty Haller
> > Sent: Tuesday, July 02, 2013 6:15 AM
> > To: '[email protected]'
> > Subject: [U2] SAN?
> >
> > Morning,
> >
> > I am curious if anybody has UniData Accounts running off a Shared Enterprise
> > SAN?
> >
> > We currently have an Enterprise SAN for our VMware Environment and would
> > like to put a handful of UniData Test Accounts on it.
> >
> > We are using UniData 7.2 on an IBM P6 running AIX 6.1, the SAN would be 4GB
> > Fiber Attached.
> >
> >
> > Thoughts?
> >
> > Ty Haller | Lead Administrator - System Services | SEFCU | [email protected]
> > 700 Patroon Creek Blvd. Albany, NY 12206 | Phone: 518-464-5210 | Fax: 518-
> > 464-5209
> >
> > This message may contain confidential information and is intended for the
> > sole
> > purpose of communication with the addressee. Dissemination or publication in
> > any format is strictly prohibited. If you have received this communication
> > in
> > error please notify SEFCU immediately.
> >
> > Help save a tree. Please print this e-mail only if it is truly necessary.
> > Thank you.
> > _______________________________________________
> > U2-Users mailing list
> > [email protected]
> > http://listserver.u2ug.org/mailman/listinfo/u2-users
> > _______________________________________________
> > U2-Users mailing list
> > [email protected]
> > http://listserver.u2ug.org/mailman/listinfo/u2-users
>
> This message may contain confidential information and is intended for the
> sole purpose of communication with the addressee. Dissemination or
> publication in any format is strictly prohibited. If you have received this
> communication in error please notify SEFCU immediately.
>
> Help save a tree. Please print this e-mail only if it is truly necessary.
> Thank you.
> _______________________________________________
> U2-Users mailing list
> [email protected]
> http://listserver.u2ug.org/mailman/listinfo/u2-users
> _______________________________________________
> U2-Users mailing list
> [email protected]
> http://listserver.u2ug.org/mailman/listinfo/u2-users
_______________________________________________
U2-Users mailing list
[email protected]
http://listserver.u2ug.org/mailman/listinfo/u2-users
