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Syncmirror (Local) doubts
by Milazzo Giacomo 09 Dec '10

09 Dec '10

Hi all, times ago I used Local Syncmirror to "move" data from old aggregates created with 144 FC disks to new 300 GB FC ones and I remember that the old:new ratio was 2:1, i.e., from an aggregate on 56 144 GB disks on 4 shelves to a new one on 28 300 GB disks on 2 shelves...But I don't remember other stuff related to raid group, geometry of them and so on...simply I used the aggr mirror and Ontap chose the needed disks from a pool of spare (Pool 1 as usual) Now I've a similar issue but with a lot of doubts (re)reading the manual. First of this is that manual states that from original aggregate and the mirrored one disks must be the same number...and I ask myself how I was able to do that job times ago?!? Anyway the problem is this: Current aggregate: 56 disks on 4 shelves of 300 GB but with rg and disk geometry wrong (rg0 20 disks, rg1 26 and rg2 8, a couple of spare). The customer wants to rebuild this aggregate using Local Syncmirror a first time to transfer data to other disks available and a second time to put the data back on the 300 GB disks with a correct rg geometry (only 2 rg with 26 disks each). I've 8 or more shelves with 144 FC disks available. Can I use Local Syncmirror fm the 4 300 GB shelves to an automatic created mirror on those 8/9 shelves letting Ontap choose the disks from the Pool 1 spares? What's about the aggr mirror xxxx -v "victim_aggrname" found on the man sections and not on the manual? Can I create a new aggregate on the 144 GB disks the use in some way this syntax? Once splitted the mirror I will temporarily have the data on the 144 disks (if work the points before) so I will be able to destroy the 'old', zero the disks and then...? To create another mirror to put the data back on the 300 GB disks will I have to create an aggregate before with the right disk geometry I want and then use this as "victim aggregate" It's a little bit complicate I know....I apologize in advance for the headaches I will cause in somebody :) but thank you in advance also! Regards, PS) we're not discussing here questions about raid group size, geometry, performances and other so I please you to avoid to ask or observe thinks like this. Also, options such as snapmirror, backup and restore and so on useless for the moment because we've about 8 TB of data (long time) to move ahed and back and Local Syncmirror offer the fastest way and overall a way usable "hot" with no disruption Dott. Giacomo Milazzo [cid:image001.jpg@01CB97F3.CA9D88C0] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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R: Issue on creating profiles on SnapManager for SAP on AIX
by Milazzo Giacomo 03 Dec '10

03 Dec '10

Thanks for update Jeffrey, we've just discovered that there's a but in 3.1 version. We've downgraded to the 3.03 and everything works. We're going to open a case but it seems that there's some bug with the java 64 env Bye ________________________________________ Da: Steiner, Jeffrey [Jeffrey.Steiner(a)netapp.com] Inviato: venerdì 3 dicembre 2010 13.48 A: Milazzo Giacomo Cc: Tedeschi Stefano Oggetto: RE: Issue on creating profiles on SnapManager for SAP on AIX That particular error means that something general failed in the java process. There might be more data in the log in /var/log/smo that shows the exact steps. Sometimes, you can plainly read the log and understand the problem. If not, you'll need to open a support case. There are lots of reasons this can happen. >-----Original Message----- >From: Milazzo Giacomo [mailto:G.Milazzo@sinergy.it] >Sent: Friday, December 03, 2010 5:33 PM >To: toasters(a)mathworks.com >Cc: Tedeschi Stefano >Subject: Issue on creating profiles on SnapManager for SAP on AIX > >Hi all, > >we're experiencing this issue nevertheless we've applied the suggestion >stated on "SnapManager for SAP 3.1 Administration Guide" (pag. 45) > >"SAP uses a standard layout for Oracle database installations. In this >layout, SAP places copies of the >Oracle control file in the /oracle/SID/origlogA, /oracle/SID/origlogB, >and /oracle/SID/sapdata1 file >systems. The control file in the sapdata1 file system conflicts with the >SnapManager requirements for >separating the control files and datafiles into separate volumes and >must be adjusted to allow for fast >restore capability." > >Has anyone some suggestion on it? It seems a well known error but we >don't find documentation on it. > >This is the result of the command line issued in verbose mode: > >root#sapQHR/opt/NetApp/smsap/properties>smsap profile create -profile >smsap_profile -repository -dbname smsap -host 192.168.10.88 -port 1521 - >login -username smsap -database -dbname QHR -host 192.168.10.38 - >osaccount smdba -osgroup dba -verbose >< >Enter password for profile smsap_profile: ***** >[ INFO] SMSAP-20020: Set password for profile "smsap_profile" in user >credentials for "root". >[ INFO] SMSAP-13046: Operation GUID 40288aa62cab8281012cab8285680009 >starting on Profile smsap_profile >[ INFO] SMSAP-13505: SnapDrive environment verification passed. >[ INFO] SMSAP-13507: JDBC verification for "OS authenticated: >QHR/192.168.10.38" passed. >[ INFO] SMSAP-13506: SQLPlus verification for database SID "QHR" passed. >Environment: [ORACLE_HOME=/oracle/QHR/102_64] >[ INFO] SMSAP-07431: Saving starting state of the database: QHR(OPEN). >[ INFO] SMSAP-07431: Saving starting state of the database: QHR(OPEN). >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/sapdata4. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata4. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/sapdata1. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata1. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/sapdata2. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata2. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/sapdata3. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata3. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/origlogB. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/origlogB. >[ INFO] SD-00016: Discovering storage resources for /oracle/QHR/oraarch. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/oraarch. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/mirrlogA. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/mirrlogA. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/origlogA. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/origlogA. >[ INFO] SD-00016: Discovering storage resources for >/oracle/QHR/mirrlogB. >[ INFO] SD-00017: Finished storage discovery for /oracle/QHR/mirrlogB. >[ INFO] SD-00040: Beginning to discover filesystem(s) upon host volume >group sapvg. >[ INFO] SD-00041: Finished discovering filesystem(s) upon host volume >group sapvg. >[ INFO] SD-00040: Beginning to discover filesystem(s) upon host volume >group oravg. >[ INFO] SD-00041: Finished discovering filesystem(s) upon host volume >group oravg. >[ERROR] FLOW-11019: Failure in BuildRestoreSteps: >java.lang.NullPointerException >[ERROR] FLOW-11008: Operation failed: java.lang.NullPointerException >[ERROR] SMSAP-05075: Profile create failed: SMSAP-13527: Error >performing fast restore check: FLOW-11019: Failure in BuildRestoreSteps: >java.lang.NullPointerException. >[ INFO] SMSAP-20022: Deleted credentials and repository mapping for >profile "smsap_profile" in user credentials for "root". >Operation Id [40288aa62cab8281012cab8285680009] failed. Error: Error >performing fast restore check: FLOW-11019: Failure in BuildRestoreSteps: >java.lang.NullPointerException. > >________________________________________ >Da: owner-toasters(a)mathworks.com [owner-toasters(a)mathworks.com] per >conto di Milazzo Giacomo >Inviato: martedì 30 novembre 2010 23.43 >A: Ray Van Dolson >Cc: toasters(a)mathworks.com >Oggetto: R: Hot adding disk shelves to N3600 A20 (FAS2050C) > >Knowing both N-Series and NetApp original one :-) I think I can answer. >The N3600-A20 is a 2050 cluster. >EXN4000 is the same as DS14MK4 (the "4" in the EXN4000 name stands for 4 >Gbps). You have to find on the shelf two SFP (Gbic) connector plugged on >the IN port of the two ESH4 controller. After all in the center of the >shelf you have a selector that permit you to switch the backend speed >from 1 to 4 Gbps (if limits to 2 you have an EXN2000). For the second >EXN4000 depends on what you want. You can add to the first using the >short 50 cm infiniband cable (out to in schema) or you can add to the >second controller using 0b ports on boths. > >You then have to plug an LC/LC fiber patch from the 0a HBA ports on the >N3600 on both heads (A20 stands for active/active). And proceed with >instructions... > >Bye, > > >-----Messaggio originale----- >Da: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] >Per conto di Ray Van Dolson >Inviato: martedì 30 novembre 2010 02:18 >A: toasters(a)mathworks.com >Oggetto: Hot adding disk shelves to N3600 A20 (FAS2050C) > >Pardon the IBM-terminology -- I have an N3600 A20 (ONTAP 7.3.1) and >have acquired two EXN4000's to expand our storage capacity. > >The N3600 A20 is currently configured as Active/Active with the >existing set of 20 SAS disks. > >I'm reading through the documentation on NOW[1] on hot-adding shelves >and am running into a few questions: > > - Is the EXN4000 the same as the DiskShelf14mk4? > - How do I know if I have ESH2/ESH4 modules or LRC or ESH modules? > >Also, the NOW documentation[1] refers to the Data ONTAP 7.3 >Active/Active Configuration guide for hot-adding of shelves since we >are using an Active/Active setup. I presume these are the insructions >I need to use and not the normal hot-add instructions[1]. > >Anything else of note I should be aware of? > >Thanks, >Ray > >(No sales inquiries please) > >[1] >http://now.netapp.com/NOW/knowledge/docs/hardware/filer/html/ds14hwsv/ap >pa5.htm#1157253

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Issue on creating profiles on SnapManager for SAP on AIX
by Milazzo Giacomo 03 Dec '10

03 Dec '10

Hi all, we're experiencing this issue nevertheless we've applied the suggestion stated on "SnapManager for SAP 3.1 Administration Guide" (pag. 45) "SAP uses a standard layout for Oracle database installations. In this layout, SAP places copies of the Oracle control file in the /oracle/SID/origlogA, /oracle/SID/origlogB, and /oracle/SID/sapdata1 file systems. The control file in the sapdata1 file system conflicts with the SnapManager requirements for separating the control files and datafiles into separate volumes and must be adjusted to allow for fast restore capability." Has anyone some suggestion on it? It seems a well known error but we don't find documentation on it. This is the result of the command line issued in verbose mode: root#sapQHR/opt/NetApp/smsap/properties>smsap profile create -profile smsap_profile -repository -dbname smsap -host 192.168.10.88 -port 1521 -login -username smsap -database -dbname QHR -host 192.168.10.38 -osaccount smdba -osgroup dba -verbose < Enter password for profile smsap_profile: ***** [ INFO] SMSAP-20020: Set password for profile "smsap_profile" in user credentials for "root". [ INFO] SMSAP-13046: Operation GUID 40288aa62cab8281012cab8285680009 starting on Profile smsap_profile [ INFO] SMSAP-13505: SnapDrive environment verification passed. [ INFO] SMSAP-13507: JDBC verification for "OS authenticated: QHR/192.168.10.38" passed. [ INFO] SMSAP-13506: SQLPlus verification for database SID "QHR" passed. Environment: [ORACLE_HOME=/oracle/QHR/102_64] [ INFO] SMSAP-07431: Saving starting state of the database: QHR(OPEN). [ INFO] SMSAP-07431: Saving starting state of the database: QHR(OPEN). [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/sapdata4. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata4. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/sapdata1. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata1. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/sapdata2. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata2. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/sapdata3. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/sapdata3. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/origlogB. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/origlogB. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/oraarch. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/oraarch. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/mirrlogA. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/mirrlogA. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/origlogA. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/origlogA. [ INFO] SD-00016: Discovering storage resources for /oracle/QHR/mirrlogB. [ INFO] SD-00017: Finished storage discovery for /oracle/QHR/mirrlogB. [ INFO] SD-00040: Beginning to discover filesystem(s) upon host volume group sapvg. [ INFO] SD-00041: Finished discovering filesystem(s) upon host volume group sapvg. [ INFO] SD-00040: Beginning to discover filesystem(s) upon host volume group oravg. [ INFO] SD-00041: Finished discovering filesystem(s) upon host volume group oravg. [ERROR] FLOW-11019: Failure in BuildRestoreSteps: java.lang.NullPointerException [ERROR] FLOW-11008: Operation failed: java.lang.NullPointerException [ERROR] SMSAP-05075: Profile create failed: SMSAP-13527: Error performing fast restore check: FLOW-11019: Failure in BuildRestoreSteps: java.lang.NullPointerException. [ INFO] SMSAP-20022: Deleted credentials and repository mapping for profile "smsap_profile" in user credentials for "root". Operation Id [40288aa62cab8281012cab8285680009] failed. Error: Error performing fast restore check: FLOW-11019: Failure in BuildRestoreSteps: java.lang.NullPointerException. ________________________________________ Da: owner-toasters(a)mathworks.com [owner-toasters(a)mathworks.com] per conto di Milazzo Giacomo Inviato: martedì 30 novembre 2010 23.43 A: Ray Van Dolson Cc: toasters(a)mathworks.com Oggetto: R: Hot adding disk shelves to N3600 A20 (FAS2050C) Knowing both N-Series and NetApp original one :-) I think I can answer. The N3600-A20 is a 2050 cluster. EXN4000 is the same as DS14MK4 (the "4" in the EXN4000 name stands for 4 Gbps). You have to find on the shelf two SFP (Gbic) connector plugged on the IN port of the two ESH4 controller. After all in the center of the shelf you have a selector that permit you to switch the backend speed from 1 to 4 Gbps (if limits to 2 you have an EXN2000). For the second EXN4000 depends on what you want. You can add to the first using the short 50 cm infiniband cable (out to in schema) or you can add to the second controller using 0b ports on boths. You then have to plug an LC/LC fiber patch from the 0a HBA ports on the N3600 on both heads (A20 stands for active/active). And proceed with instructions... Bye, -----Messaggio originale----- Da: owner-toasters(a)mathworks.com [mailto:owner-toasters@mathworks.com] Per conto di Ray Van Dolson Inviato: martedì 30 novembre 2010 02:18 A: toasters(a)mathworks.com Oggetto: Hot adding disk shelves to N3600 A20 (FAS2050C) Pardon the IBM-terminology -- I have an N3600 A20 (ONTAP 7.3.1) and have acquired two EXN4000's to expand our storage capacity. The N3600 A20 is currently configured as Active/Active with the existing set of 20 SAS disks. I'm reading through the documentation on NOW[1] on hot-adding shelves and am running into a few questions: - Is the EXN4000 the same as the DiskShelf14mk4? - How do I know if I have ESH2/ESH4 modules or LRC or ESH modules? Also, the NOW documentation[1] refers to the Data ONTAP 7.3 Active/Active Configuration guide for hot-adding of shelves since we are using an Active/Active setup. I presume these are the insructions I need to use and not the normal hot-add instructions[1]. Anything else of note I should be aware of? Thanks, Ray (No sales inquiries please) [1] http://now.netapp.com/NOW/knowledge/docs/hardware/filer/html/ds14hwsv/appa5…

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Hot adding disk shelves to N3600 A20 (FAS2050C)
by Ray Van Dolson 30 Nov '10

30 Nov '10

Pardon the IBM-terminology -- I have an N3600 A20 (ONTAP 7.3.1) and have acquired two EXN4000's to expand our storage capacity. The N3600 A20 is currently configured as Active/Active with the existing set of 20 SAS disks. I'm reading through the documentation on NOW[1] on hot-adding shelves and am running into a few questions: - Is the EXN4000 the same as the DiskShelf14mk4? - How do I know if I have ESH2/ESH4 modules or LRC or ESH modules? Also, the NOW documentation[1] refers to the Data ONTAP 7.3 Active/Active Configuration guide for hot-adding of shelves since we are using an Active/Active setup. I presume these are the insructions I need to use and not the normal hot-add instructions[1]. Anything else of note I should be aware of? Thanks, Ray (No sales inquiries please) [1] http://now.netapp.com/NOW/knowledge/docs/hardware/filer/html/ds14hwsv/appa5…

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RE: How to design for iops?
by Kennedy, Jeffrey 29 Nov '10

29 Nov '10

We tried the flexshare route and it had an impact but only slight. I suspect it's because there is still delay for other requests when this group has filled NVRAM and all that has to flush to disk before it can service the comparatively miniscule "other stuff". And once that slight interrupt has happened the process repeats. But that's only a suspicion. In any case, we're fast coming to the conclusion that this particular group just needs to be isolated, they do not play well with others. So we'll review the tool's characteristics and determine if high end is needed or if mid-range is ok once isolated. As for a BOGF (Bolt-On-Go-FasterTM) Avere is a front runner for write/read acceleration, which is also a possibility for us with this particular group. Thanks. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592 From: Jan-Pieter Cornet [mailto:johnpc@xs4all.net] Sent: Thursday, November 25, 2010 2:59 PM To: Kennedy, Jeffrey Cc: NDMP List (toasters(a)mathworks.com) Subject: Re: How to design for iops? On 2010 Nov 23, at 21:06 , Kennedy, Jeffrey wrote: Let me first define iops in this case. Metadata operations with a larger percentage of writes than reads. I have a group that will regularly drive 60-70k metadata operations per second that consist of updates more than half the time. 10Gb and PAM cards will help with reads but the writes are the killer. Today they are on shared 6070's with both PAM and 10Gb. I'm using PA to see the "other ops" which is where I got the 60-70k number. It doesn't break out read v write for metadata but based on 'sysstat' I got the over-half-write info. When they ramp up everyone else on that filer feels it. Is there something that can be done to improve this other than isolating them? You could give them a lower priority using the 'priority' command (available in ontap 7.2+, known as 'FlexShare'). That way, other operations would have priority over these writes. That said, make sure you have the basics right: the aggregates where the write go should have enough space: at most 80% can be used preferably less. It should have enough spindles. Add more disks if your disk utilisation is high or CP take too long. Move everything else off of that aggregate. Writes mainly put a load on the NVRAM card. A somewhat debatable performance boost would be to remove the clustering and interconnect, making your entire NVRAM card available for writes, instead of taking up half of the NVRAM card for the cluster partner (of course, going from cluster to a stand-alone system will seriously impact your uptime and fault tolerance. Make sure you know what you do). Doing a headswap for a system with more nvram will also be beneficial (but not exactly low cost or easy to implement). I'm not aware of hardware addons that boost write performance, but do ask your netapp sales rep, there might be something available. -- Jan-Pieter Cornet <johnpc(a)xs4all.net<mailto:johnpc@xs4all.net>> Systeembeheer XS4ALL Internet bv Internet: www.xs4all.nl<http://www.xs4all.nl> Contact: www.xs4all.nl/contact<http://www.xs4all.nl/contact>

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R: Is there's a way to remove and reassign a disk?
by Milazzo Giacomo 27 Nov '10

27 Nov '10

Thanks all for answers. They're quite what I was thinking about "physics" :) Also if I could use "fail/unfail" the raid group I operate is always the same...so that I could remove a disk from it but this last want back a disk :) And all this stuff for the customer is worried about the overall performances. He's got now three rg, the first with 20, the second with 26 and the last with 6 disks and he's concerned about performances gave by the smaller rg influencing all the aggregate... Da: Davin Milun [mailto:davin.milun@gmail.com] Inviato: sabato 27 novembre 2010 14:55 A: Milazzo Giacomo Cc: toasters(a)mathworks.com Oggetto: Re: Is there's a way to remove and reassign a disk? No - you're stuck with your raidgroup configuration, short of destroying the aggr. If it really was just a specific incorrect DISK that was used, and you wanted to use another, you could use "disk replace" to do that - but that won't let you change raidgroup layout. Davin. On Sat, Nov 27, 2010 at 5:17 AM, Milazzo Giacomo <G.Milazzo(a)sinergy.it<mailto:G.Milazzo@sinergy.it>> wrote: Hi all, In my experience I think is not possibile but a customer of mine has this issue. He wanted to extend the two raid group of his aggregate but once increased the raid group size he forgot to use the syntax: >aggr add -d x.y -g raidgroup name So the last raid group has been extended and another raid group has been created with only 5 disks... He asked me how to go back and my answer is: "Copy the data, destroy the aggr and recreate it..." :) But I remember that times ago a customer of mine used the "disk fail" command just to try it and (not sure on syntax) he was able to "unfail" the disk. So, what, for this case, if "disk fail" is used to fail the disk, rebuild its data on a spare, the unfail the failed, zeroed and manually assigned to the right raid group? Dott. Giacomo Milazzo [cid:image001.jpg@01CB8E48.29D11970] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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Is there's a way to remove and reassign a disk?
by Milazzo Giacomo 27 Nov '10

27 Nov '10

Hi all, In my experience I think is not possibile but a customer of mine has this issue. He wanted to extend the two raid group of his aggregate but once increased the raid group size he forgot to use the syntax: >aggr add -d x.y -g raidgroup name So the last raid group has been extended and another raid group has been created with only 5 disks... He asked me how to go back and my answer is: "Copy the data, destroy the aggr and recreate it..." :) But I remember that times ago a customer of mine used the "disk fail" command just to try it and (not sure on syntax) he was able to "unfail" the disk. So, what, for this case, if "disk fail" is used to fail the disk, rebuild its data on a spare, the unfail the failed, zeroed and manually assigned to the right raid group? Dott. Giacomo Milazzo [cid:image001.jpg@01CB8E24.49A29630] Technical Account Manager Sinergy SpA Filiale di Roma * 00198. viale Regina Margherita, 269 ' (+39) 3406001045 0644245272 7 (+39) 0226922048 * Giacomo.Milazzo(a)Sinergy.it

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GBIC question
by David McWilliams 23 Nov '10

23 Nov '10

We purchased a new FAS2020 and we didn't order a GBIC at the same time, we now want to connect to a FCAL tape drive. Can I use a standard GBIC or do I have to get one from NetApp? Sláinte, David "Build a man a fire he'll be warm for a day, set a man on fire and he'll be warm for the rest of his life" <http://en.wikipedia.org/wiki/Discworld> - Terry Pratchett <http://en.wikipedia.org/wiki/Terry_Pratchett> Checkout my photos - http://www.panoramio.com/user/1113507

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RE: NDMP backup of snapmirror target
by Kennedy, Jeffrey 23 Nov '10

23 Nov '10

I would be very interested to hear from Netapp contributors if NDMP backups of volume snapmirror's has changed. My education at the time was that volume level snapmirror's are RO for all blocks, which means inode pointers could not change since that meant a change to blocks *in* the volume. QSM/Snapvault has never suffered from this issue. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592 From: Jeremy Webber [mailto:Jeremy.Webber@al.com.au] Sent: Sunday, November 21, 2010 6:22 PM To: Kennedy, Jeffrey Cc: Jeremy Webber; Fred Grieco; toasters(a)mathworks.com Subject: Re: NDMP backup of snapmirror target Maybe there were limitations in earlier versions of OnTAP but I can confirm that we do tape backups, via tape, from a snapmirror destination without having to break the snapmirror relationship. A snapshot is automatically created in the snapmirror destination for the duration of the NDMP job. I can't recall if subsequent snapmirror updates fail during the backup and am not able to test this right now. OnTAP 7.3.2. -jeremy On 17/11/2010, at 6:11 AM, Kennedy, Jeffrey wrote: Things may have changed in OT since I last was concerned with tape backups but as I recall a snapmirrored *volume* can't take the backup snapshot because it's RO. So you point the backup software at the newest snapshot in the RO volume and back up that view. The only reason the NDMP backup makes a snapshot is to guarantee consistency. An existing snapshot already has that. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592 From: owner-toasters(a)mathworks.com<mailto:owner-toasters@mathworks.com> [mailto:owner-toasters@mathworks.com] On Behalf Of Fred Grieco Sent: Tuesday, November 16, 2010 6:26 AM To: toasters(a)mathworks.com<mailto:toasters@mathworks.com> Subject: NDMP backup of snapmirror target I am snapmirroring several volumes to a DR site, and I would like to do tape backups at that site. How should I do them? Can I use NDMP? It seems like I can't do straight NDMP because the replicated target is read-only. I am currently creating flexclones from snapshots existing in the volume (nightly.0...) but flexclone then locks this snapshot and snapmirror will fail to update ( I'm not sure if this happens at the next update or when the source system attempts to remove that snapshot and copy it over... I wasn't watching). What do you generally do to get snapmirrored volume data to tape? TIA, Fred -- Jeremy Webber Senior Systems Engineer Animal Logic Pty Ltd T: +61 2 9383 4837 F: +61 2 9383 4801

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How to design for iops?
by Kennedy, Jeffrey 23 Nov '10

23 Nov '10

Let me first define iops in this case. Metadata operations with a larger percentage of writes than reads. I have a group that will regularly drive 60-70k metadata operations per second that consist of updates more than half the time. 10Gb and PAM cards will help with reads but the writes are the killer. Today they are on shared 6070's with both PAM and 10Gb. I'm using PA to see the "other ops" which is where I got the 60-70k number. It doesn't break out read v write for metadata but based on 'sysstat' I got the over-half-write info. When they ramp up everyone else on that filer feels it. Is there something that can be done to improve this other than isolating them? Thanks. Jeff Kennedy Qualcomm, Incorporated QCT Engineering Compute 858-651-6592

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