toasters December 2006

toasters@lists.teaparty.net

50 participants
40 discussions

V-Series with NDMP backup
by Ammar Zolkipli 20 Dec '06

20 Dec '06

Gents, Let me first explain the overall layout. I've got a D2D2T design. Both primary and secondary filers are v-series, and snapvaulted. We have 16TB of CIFS home dir data volumes backing up to tape via NDMP. And the tape backup is on LTO-3 running at sustained throughput of 20mbps, (F**king slow, I know). Does anybody have experience how to speed up NDMP backup? At this point, the LTO-3 is shoe-shining as the minimum sustained throughput on that drive is 40mbps. And also, does anybody have … [View More]

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RE: Aggregrate snap reserve (again)
by Glenn Walker 19 Dec '06

19 Dec '06

I'm pretty sure that the aggr snap reserve is not needed for core dump - this is written to the 10% overhead space (or to spare drives, depending on how you've configured your filer), then when the filer comes back up and the 'savecore' is performed, it is written to the /etc/crash directory. As for the aggr copy command, that is news to me (you see how often I've used it). The one thing you did overlook: restoring an aggregate - not individual volume, mind you. This is the same … [View More]

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RE: Aggregrate snap reserve (again)
by Learmonth, Peter 18 Dec '06

18 Dec '06

Core dump does not go into aggr snap reserve. During panic, core is dumped into a reserved area (the space chopped off by rightsizing) on one or more non-broken disks (outside of WAFL, since WAFL code runs in memory, which we might no longer trust depending on what went wrong and we're dumping it). During reboot, savecore (see the man pages and System Admin Guide) moves the core from reserved area to /etc/crash, where it can be picked up by the user or other process. I could be wrong about … [View More]

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Aggregrate snap reserve (again)
by Michael Schipp 18 Dec '06

18 Dec '06

Hi all, We have had a lot of talk since DOT 7 of this but just to clear it up some (I hope). aggregate snapshots are required if you use (default 5%); * RAID SyncMirror and/or MetroCluster configurations. * Aggr copy command * Core dump IS the core dump in on aggr0 snap space only? So if a Filer/FAS has two aggregates and not using or needing SyncMirror and the aggrcopy command is it safe to turn off the aggregate snap reserve for aggr1 (still … [View More]

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RE: CF Disk Configuration Question
by Learmonth, Peter 18 Dec '06

18 Dec '06

This is completely supported. I would suggest putting loopback plugs on the unused ports. This was best practice on FAS900, but I'm not sure about FAS3000. The loopback plugs slightly improve takeover and reboot times by not having the filer wait for timeout on an open loop. LC loopback is X6521-R6 http://now.netapp.com/eservice/partDetails.do?partNumber=X6521-R6&produc tId=60420&rohsCompliant=R6 I know it says FAS270 on there, but it is used on any LC connector where loopback is … [View More]

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RE: CF Disk Configuration Question
by Holland, William L 18 Dec '06

18 Dec '06

Worse case, put a fiber loopback plug in any vacant fiber ports. -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Willeke, Jochen Sent: Monday, December 18, 2006 8:59 AM To: Stephen C. Losen; toasters(a)mathworks.com Subject: RE: CF Disk Configuration Question Hi, we never run this configuration over a long time, but during cluster updates we had this configuration several times, even it was only for a couple of minutes. From … [View More]

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CF Disk Configuration Question
by Stephen C. Losen 18 Dec '06

18 Dec '06

We have a 3050c clustered pair where both filers have 4 shelves of 144G FC disks each. We want to add two shelves of 500G SATA drives to one filer. We are not allowed to mix FC and SATA on the same FC Loop, so the two new shelves must be on a separate loop. Since this is a CF configuration, we will connect these shelves to both filers. The filer that owns the shelves will connect using the "A" port of its adapter while the partner filer will use its "B" port. But since we are not adding … [View More]

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RE: iSCSI Cluster help
by Glenn Walker 16 Dec '06

16 Dec '06

Yeah - the default SCSI timeout in windows is 10 seconds - that should be increased to at least 180 seconds as a failback could take up to 3 minutes. If you have snapdrive, it does this for you automatically. FYI - leaving it at only 10 seconds could be REALLY bad if you have a performance hungry application like Exchange (verification plus normal operation could create havoc with undersized spindle count). Glenn -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-… [View More]

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iSCSI Cluster help
by rob-7704＠austin.rr.com 16 Dec '06

16 Dec '06

Hey you iSCSI wizards, We are just getting into iSCSI for winders and have the following scenario happen today: We had a failover on a cluster member that host test/infrastructure systems today, due to a faulty ESH2 (that was triggered by a background FW update, but that is a different discussion). This filer also has an iSCSI volume on a test window server. During a failover, it reported errors, but the iSCSI reconnected. However, during a giveback (after NetApp replaced the faulty ESH2),… [View More]

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Re:AFS
by Rohit 15 Dec '06

15 Dec '06

Hi Mike GX maybe the AFS flavor from NetApp. http://blogs.netapp.com/dave/TechTalk/?permalink=ONTAP-GX-151-Past-and-Futu… On the other hand, if you're looking for something _free_, try http://www.openafs.org/. AFS is killer replacement for NFS if you have lots of many small files that get constantly updated. Of course, not to mention, doing away with stale file handles as well. regards rohit Sphar, Mike wrote: > Just throwing a question out there curious to hear people's thoughts or … [View More]

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toasters December 2006