toasters September 2006

toasters@lists.teaparty.net

39 participants
44 discussions

Performance Indicators
by Willeke, Jochen 15 Sep '06

15 Sep '06

Hi Toasters, right now i am thinking about any kind of performance indicator for my fileservice. We do supply storage to other departments of our company. Of course one thing i can sell is space. But there is another indicator which is performance. Has anybody good ideas how to define the performance i can grant to a special service? I was thinking about I/O's per second but do not know what a good number would be. Has anybody ever had to work out those values and can give me something to … [View More]

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the Toasters list is now restricting posts!
by Kevin Davis 12 Sep '06

12 Sep '06

Folks, Just an FYI to all: we've had to take the measure of restricting posting to the 'toasters' list, meaning that the list will only accept posts from an address which is subscribed. Sorry for taking this measure, but the nature of email today has left us no alternative (not one that will still allow us to get our jobs done, that is!); it's a way to keep the spam to the list to a minimum. And for what it's worth, the spam to the list is almost nil now. (knock wood and cross your … [View More]

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RE: Snap status and wafl scan
by Glenn Walker 08 Sep '06

08 Sep '06

You are correct - the reclamation is a new feature - introduced around 7.0 I believe. Unsure what version of ONTAP the issue was being seen on, but there were some bugs related to that feature-set that were fixed in later versions - some bugs were related to its efficiency, while some were related to the timing (when the freed space was showing back up). Glenn -----Original Message----- From: Chris Thompson [mailto:cet1@cus.cam.ac.uk] Sent: Friday, September 08, 2006 12:07 PM To: toasters(a)… [View More]

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RE: jumbo frames support
by Fox, Adam 08 Sep '06

08 Sep '06

Yes, Jumbo frames are supported via the ifconfig command. The command allows you to set the mtusize. Although it's probably worth opening a support case and have them run a perfstat on your system while you are experiencing slow performance. If it's really as slow as you say, it's probably not the mtusize. It might be, but there are probably other things you can adjust in your environment first. But NGS has the resources to work with you to figure those out. Just a thought. -- Adam Fox … [View More]

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jumbo frames support
by kunle windapo 08 Sep '06

08 Sep '06

hello, i have a FAS 270 with volumes nfs mounted on a Solaris 9 sparc server. there is a direct connection from the solaris server to ethernet interface on the FAS 270 running at 1Gb/s. problem is i experience very slow performance on the system, (io related) and i'm troubleshooting. i want to know if NetApp supports Jumbo frames on the Network interface. thank you __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around … [View More]

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RE: Snap status and wafl scan
by Glenn Walker 08 Sep '06

08 Sep '06

Ok - those are other things than what I previously mentioned. Active Bitmap rearrangement is normal - I believe it has been around since 6.5 (pretty sure it wasn't a flexvol thing, that was 'deswizzler' scan). It's to keep memory 'pretty', if memory serves. The container block reclamation is a scanner responsible for ferreting out blocks that have been freed and marking them as usable to the system (delayed free scanner\delayed freer working here). This too is normal. Glenn -----Original … [View More]

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NDMP backups, timeouts
by Scott T. Mikusko 08 Sep '06

08 Sep '06

I'm running into a recurring issue with backing up my NearStore and a long F760 filer. In the procoess of backing some large filesystems (qtrees), it appears that NDMP is basically timing out and fails. I'm running Veritas NetBackup 6.0 (finally upgrading from 4.5 recently). I think the issue has to do with NDMP starting the dump commands on the filer, which then does a three-way backup to another filer with local tape drives. The debug from ndmp logs shows for a manual full backup of a … [View More]

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Snap status and wafl scan
by ec0li 07 Sep '06

07 Sep '06

Hello, When I check snap status, I see next to recent snapshots : (xxxx/xxxx remaining). Also, It seems that this is in fact the wafl scan process "snap create summary update" Does anyone knows what is this process, its purpose, what happens if the system reboots during this,... I'm asking this because on one system with lots of snapshots(snapvault) this process seems to never finish. In fact, each time a new snap is transfered the counter restarts from the beginning but has not enough time … [View More]

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RE: Snap status and wafl scan
by Glenn Walker 07 Sep '06

07 Sep '06

It may have something to do with the fact that SnapVault 'stitches' snapshots together on the back end - by that I mean that there is a coalescing function that puts the multitude of individually transferred snapshots together once they are all on the destination system and it makes it one single destination snapshot. Glenn -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of ec0li Sent: Thursday, September 07, 2006 5:26 AM To: … [View More]

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RE: NDMP backups, timeouts
by George, Andrew 07 Sep '06

07 Sep '06

Hi We noticed it after upgrading from onTap 6.3 to 6.5 The fix in that case was to turn of ndmpd.offset_map.enable. What happened in (I think it was in 6.4) was ndmpd had a slight functionality change so it does a lot more processing up front. Andrew -----Original Message----- From: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Scott T. Mikusko Sent: Thursday, 7 September 2006 9:20 AM To: toasters(a)mathworks.com Subject: NDMP backups, timeouts I'm … [View More]running into a recurring issue with backing up my NearStore and a long F760 filer. In the procoess of backing some large filesystems (qtrees), it appears that NDMP is basically timing out and fails. I'm running Veritas NetBackup 6.0 (finally upgrading from 4.5 recently). I think the issue has to do with NDMP starting the dump commands on the filer, which then does a three-way backup to another filer with local tape drives. The debug from ndmp logs shows for a manual full backup of a filer: Sep 05 21:05:57 EDT [ndmpd:58]: Log message: DUMP: creating "/vol/vol0/../snapshot_for_backup.370" snapshot. Sep 05 21:06:05 EDT [ndmpd:58]: Log message: DUMP: Using Partial Volume Dump with Exclude Lists Sep 05 21:07:31 EDT [ndmpd:58]: Log message: DUMP: Date of this level 1 dump: Tue Sep 5 21:05:57 2006. Sep 05 21:07:31 EDT [ndmpd:58]: Log message: DUMP: Date of last level 0 dump: Fri Aug 18 19:20:57 2006. Sep 05 21:07:31 EDT [ndmpd:58]: Log message: DUMP: Dumping /vol/vol0/files3.rt to NDMP connection Sep 05 21:07:31 EDT [ndmpd:58]: Log message: DUMP: mapping (Pass I)[regular files] It never completes the mapping of the files in Pass I. It just sits there. The filesystems I'm backing up are between 250-650GB with a LOT of small files (millions) and many subdirs. Tons of mail and html files. My guess is that the amount of files and dirs are getting large that NDMP can't map them fully and is timing out after 8 hours. It shouldn't take that long to map files for the size of data it's doing; I've seem mapping times be much less for larger sets of data. I know that the filesystem topology can cause NDMP backups to be slow, depending on file sizes, data layout, filer load, network etc, but this is happening on moderately busy filers or bone idle NearStores. Anyone run across lengthy DUMP times? Chewing through NOW and Veritas support site hasn't turned up anything obvious. Just curious if others have run into NDMP/dump issues like this. -Scott "This e-mail and any attachments to it (the "Communication") is, unless otherwise stated, confidential, may contain copyright material and is for the use only of the intended recipient. If you receive the Communication in error, please notify the sender immediately by return e-mail, delete the Communication and the return e-mail, and do not read, copy, retransmit or otherwise deal with it. Any views expressed in the Communication are those of the individual sender only, unless expressly stated to be those of Australia and New Zealand Banking Group Limited ABN 11 005 357 522, or any of its related entities including ANZ National Bank Limited (together "ANZ"). ANZ does not accept liability in connection with the integrity of or errors in the Communication, computer virus, data corruption, interference or delay arising from or in respect of the Communication." [View Less]

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toasters September 2006