toasters March 2005

toasters@lists.teaparty.net

63 participants
88 discussions

iSCSI for HP-UX
by Derek Lai 08 Mar '05

08 Mar '05

Has anyone tried iSCSI with filers on HP-UX? We are running HP-UX 11i and I noticed that HP does have drivers for iSCSI. Just wondering how robust it is. Anyone actually running Oracle with it? Derek

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RE: command line for a filerview output (snapshot used)
by Ta, Quy 07 Mar '05

07 Mar '05

"snap delta" Quy Ta Network Appliance 888.463.8277 Technical Support 512-554-2545 mobile -----Original Message----- From: aaron hirsch [mailto:aaronh@uptime.net] Sent: Monday, March 07, 2005 2:52 PM To: toasters(a)mathworks.com Subject: RE: command line for a filerview output (snapshot used) >Using Filerview, one can see the amount of space consumed by each snapshot on any volume, by >going to Volume->Snapshots->Manage screen. >Is there a command line option that will give me the same output? >Volume Name Date Used Total Status >vol1 nightly.3 Mar 02 23:26 405.3 MB 1.133 GB normal >vol1 nightly.2 Mar 03 23:22 735.1 MB 754.5 MB normal >vol1 nightly.1 Mar 04 23:23 13.21 MB 19.47 MB normal >vol1 weekly.0 Mar 05 23:19 3.145 MB 6.262 MB normal >vol1 nightly.0 Mar 06 23:18 1.691 MB 1.691 MB normal Are you looking for the exact same syntax? If not, "snap list" should do the trick for you. If you want it on a per volume basis "snap list <volume name>"

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Re: Quick access to quota information
by JacekN 07 Mar '05

07 Mar '05

Todd Sawler wrote: > Jacek, > > Have you looked at BlueArc? We are a reseller....take a look at the > website. > > www.bluearc.com <http://www.bluearc.com> And how can you solve my probleM/ Best regards, Jacek

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RE: command line for a filerview output (snapshot used)
by aaron hirsch 07 Mar '05

07 Mar '05

>Using Filerview, one can see the amount of space consumed by each snapshot on any volume, by >going to Volume->Snapshots->Manage screen. >Is there a command line option that will give me the same output? >Volume Name Date Used Total Status >vol1 nightly.3 Mar 02 23:26 405.3 MB 1.133 GB normal >vol1 nightly.2 Mar 03 23:22 735.1 MB 754.5 MB normal >vol1 nightly.1 Mar 04 23:23 13.21 MB 19.47 MB normal >vol1 weekly.0 Mar 05 23:19 3.145 MB 6.262 MB normal >vol1 nightly.0 Mar 06 23:18 1.691 MB 1.691 MB normal Are you looking for the exact same syntax? If not, "snap list" should do the trick for you. If you want it on a per volume basis "snap list <volume name>"

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command line for a filerview output (snapshot used)
by Sto Rage© 07 Mar '05

07 Mar '05

Hi, Using Filerview, one can see the amount of space consumed by each snapshot on any volume, by going to Volume->Snapshots->Manage screen. Is there a command line option that will give me the same output? Volume Name Date Used Total Status vol1 nightly.3 Mar 02 23:26 405.3 MB 1.133 GB normal vol1 nightly.2 Mar 03 23:22 735.1 MB 754.5 MB normal vol1 nightly.1 Mar 04 23:23 13.21 MB 19.47 MB normal vol1 weekly.0 Mar 05 23:19 3.145 MB 6.262 MB normal vol1 nightly.0 Mar 06 23:18 1.691 MB 1.691 MB normal TIA -G

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RE: nis.group_update.enable
by Luke Howard 05 Mar '05

05 Mar '05

>Does anyone have experience using LDAP to obtain group information on >filers using the RFC 2307 compliant options in DOT 6.5 and up, >specifically with Novell eDirectory? I had some success configuring it against XAD (which supports a variant of RFC 2307). More information is at: http://www.padl.com/TechNotes/XADONTAPConfigurationNote.html >I'm also curious about how the ldap.usermap.* options work - the >documentation is a bit vague on what the filer expects to see in the >.attribute.*account options and how/when lookups are performed. Anyone >played this or know what the code does? I think this is to handle the case where a single identity has different user names for UNIX and Windows. eg: options ldap.usermap.attribute.unixaccount uid options ldap.usermap.attribute.windowsaccount sAMAccountName Presumably you can avoid the overhead of an extra lookup if user names are the same in your deployment. -- Luke --

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RE: Oracle DSS on filer
by Frank, Jason 04 Mar '05

04 Mar '05

If all that you require is a R/O database, why not use Oracle's Hot Standby feature? I realize that this doesn't much rely on NetApps (although it's handy for the initial copy...), but it does the job quite well. I've got a Hot Standby that has been up and running for 3 years, and 2 major Oracle Upgrades without problems. Jason -----Original Message----- From: George Kahler [mailto:george@YorkU.CA] Sent: Friday, March 04, 2005 3:26 PM To: toasters(a)mathworks.com Subject: Oracle DSS on filer I'm looking for help with Oracle 9i/Oracle DSS on a filer. Some time ago I set up an environment for my DBAs to allow them to have a DSS version of the University Student Information System database (SIS - about 140 GB + duplex logs) based on the NetApp document "Implementing a DataMart/DSS Oracle Databse [TR3041]." The problem that users are complaining about is that it takes about 1/2 hr for the DBAs to create the DSS. This is created nightly at midnight. The DBAs shutdown the database, take a snapshot of the database volume and a snapshot of the log volume. Then they proceed to copy control file info and about 17 GB of logs and some undo table from the R/W database to the DSS database. They're saying that this is necessary because when the DSS comes up it wants to do a rollback and thus it needs the old logs/undo to do this. Question that everyone is asking: Isn't there a way that you can tell the DSS database to ignore the recovery (since it is a R/O database anyway) and just start up without processing the logs and the undo ? Thx, ------------------------------------------------------------------------ ------- George Kahler e-mail: george(a)yorku.ca Sr. Systems Administrator humans: (416) 736-2100 x.22699 Computing and Network Services machines: (416) 736-5830 Ontario, Canada, M3J-1P3

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Oracle DSS on filer
by George Kahler 04 Mar '05

04 Mar '05

I'm looking for help with Oracle 9i/Oracle DSS on a filer. Some time ago I set up an environment for my DBAs to allow them to have a DSS version of the University Student Information System database (SIS - about 140 GB + duplex logs) based on the NetApp document "Implementing a DataMart/DSS Oracle Databse [TR3041]." The problem that users are complaining about is that it takes about 1/2 hr for the DBAs to create the DSS. This is created nightly at midnight. The DBAs shutdown the database, take a snapshot of the database volume and a snapshot of the log volume. Then they proceed to copy control file info and about 17 GB of logs and some undo table from the R/W database to the DSS database. They're saying that this is necessary because when the DSS comes up it wants to do a rollback and thus it needs the old logs/undo to do this. Question that everyone is asking: Isn't there a way that you can tell the DSS database to ignore the recovery (since it is a R/O database anyway) and just start up without processing the logs and the undo ? Thx, ------------------------------------------------------------------------------- George Kahler e-mail: george(a)yorku.ca Sr. Systems Administrator humans: (416) 736-2100 x.22699 Computing and Network Services machines: (416) 736-5830 Ontario, Canada, M3J-1P3

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Anyone using Netapp filers for SAN or email ?
by Steve Losen 04 Mar '05

04 Mar '05

We have used Netapp filers for 8 years and are very pleased. We currently have a F820c pair for NFS and CIFS access to home directories and web content. I am one of the primary filer admins. We are about to purchase some disk storage to replace a lot of locally attached and SAN RAID arrays (Sun T3s and T4s) for some Solaris servers. Naturally I think we should buy Netapp. One project is our administrative Oracle servers. I realize that Netapp and Oracle both recommend using NFS with Netapp, but we currently have a SAN infrastructure and lots of other inertia to overcome. If we buy Netapp for this, the filers will at least start out serving LUNs on our SAN. I am convinced that Netapp is they way to go for NFS, but I have not seen much about Netapp in a SAN environment. We were looking at EMC Symmetrix, but probably cannot afford it, so it will probably be a choice between EMC Clariion and Netapp. Our "production instance" (I'm not familiar with the particulars) is 500G and growing. We also have a data warehouse instance and other misc. databases. The warehouse is copied fresh from production each night and then a 6 hour job crunches on it before it is made available for querying. Obviously a cloned volume would be nice here. Is anyone running Oracle on Solaris over a SAN to a Netapp? How is the performance? How many filers and what models? How much storage? How many disks? We are familiar with all the nifty snapshot features, volume cloning, etc. We just don't want to find out the hard way that the Netapp SAN solution is a poor performer with Oracle. We also have a University email system on Solaris servers running Communigate Pro. We have over 20,000 users and about 1TB of email on disk. We are using mbox format and most email clients use imap. Our email admins looked into maildir format but found that in our environment it took ten times longer for imap to scan inboxes. This is not a surprise since inboxes usually have a lot of short messages, so it is often faster to just read the whole inbox than open a file for each message and read just the headers. And imap regularly needs to scan all the message headers in an inbox. There are many advantages to the maildir format, but we are afraid that it would crush our current system. However, we are thinking that a Netapp filer would do a better job with maildir than a local Veritas filesystem on Solaris. Is anyone out there running a large email system over NFS to a Netapp filer using maildir format? If you are using Communigate Pro, and/or do a lot of imap, that would be even better. How many email accounts and how much mail do you process? How many filers and what models? How much storage? Do you have any performance issues? Currently our email servers do a lot more reads than writes (we read over 5 bytes for each byte we write). We don't know what the actual disk activity is inside the T3s and T4s, we only know how much we read and write from each LUN. We don't know the actual RAID 5 write overhead, and we don't know how many reads are satisfied from cache internal to the T3s and T4s. Our email admins say that the T3s occasionally get swamped, but that the T4s seem to be doing fine, so they could probably replace the T3s with T4s and be OK for a couple years. But they want to expand storage and triple user quotas and perhaps switch to maildir, and they are afraid that T4s can't handle all that. Plus snapshots would make restoring lost email messages so much easier. Thanks for any information you can give me. I'm going to look at Netapp's white papers, too. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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RE: nis.group_update.enable
by Krueger, Jeffrey 04 Mar '05

04 Mar '05

Does anyone have experience using LDAP to obtain group information on filers using the RFC 2307 compliant options in DOT 6.5 and up, specifically with Novell eDirectory? I'm also curious about how the ldap.usermap.* options work - the documentation is a bit vague on what the filer expects to see in the .attribute.*account options and how/when lookups are performed. Anyone played this or know what the code does? - Jeff -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Steve Losen Sent: Thursday, March 03, 2005 3:32 PM To: Bob Borowicz Cc: toasters(a)mathworks.com Subject: Re: nis.group_update.enable > I read where it was recommended (I think for Oracle RAC) to enable the > following option: > > nis.group_update.enable > > The man page says this enables a local cache of the group data. > > Are calls to the NIS (ypbind) slow in DOT? > > I'm running 6.4.4R1 > The problem is that NIS provides group maps keyed by group name and by group number (gid). It does not, however, provide a map that is keyed by user that lists all the groups that the user belongs to. But this group list is what a filer needs whenever a user logs in to CIFS (to map windows credentials to Unix credentials) In order to discover which groups a user belongs to, the filer must use NIS to fetch each group entry and see if the user is listed in it. If you have a very long group map, then every time a user logs in to CIFS the filer must fetch each group entry, with a separate NIS transaction for each one. By caching the group map, the filer can get the user's group list without NIS. Who knows, the cache may even be organized as group lists keyed by user name. This is not a problem peculiar to netapps. All Unix systems that use NIS have to linearly scan the entire group map every time a user logs in, to find the user's groups. If you are not using CIFS then you don't have a problem. NFS does not cause the netapp to scan the group map because each NFS packet contains the user's uid, gid, and group list. The NFS client obtains this information once when the user logs in. I also wouldn't worry about it if your group map is not large. Anecdote alert: A few years back one of our NIS servers started chewing up tons of CPU. I traced it and discovered that it was almost 100% sequential scans of our very large group map (almost 700 groups). It turned out that most of these scans were coming from the same machine, which was a busy web server. We had a CGI program run via suexec (which runs the CGI as a particular user). Suexec sets the group list for the user, which requires a linear scan of the NIS group map. So every time this CGI was hit (constantly) the web server was shooting almost 700 NIS requests at the NIS server. On our netapps and web servers we are now using local /etc/group files updated periodically by cron jobs that copy the NIS map to the local file -- much much better. Steve Losen scl(a)virginia.edu phone: 434-924-0640 University of Virginia ITC Unix Support

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toasters March 2005