Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
The Xraid is a very well thought of storage device with a heck of a price point. Attached is an image of the "Settings"/"Performance" Screen where you see "Allow Host Cache Flushing". I think when you use ZFS, it would be best to uncheck that box. This is what happen when you do use GUI in your native language (french in my case). I finally understood what was the meaning in french, after reading it from your image in english :) And your setting just boosted my BW from 0.8 MiB/s to 7 MiB/s * !! good to see that it just works. The only 2 drawbacks to using Xserve raid that I have found are: 1. Partition Management, dynamic expansion and Volume management. If we stay native in OSX tools/filesystems we cant partition with free space then later try to create a partition and retain the data from the already created partition. This really sucks. I'm betting Xsan changes these limitations however. I would love that the Xserve juste provide a way to exports 14 disks to the Host. In this way, we could manage it with zfs in a more fine grained fashion. 2. Each controller can only talk to 7 disks (1/2 the array). Other than that, the thing is really fast, and quite reliable. Not to mention the sexy blue lights that tell you its hummin' yeah right.. quite sexy ! -Andy Ced. * (a MiB is a mebibyte 2^20 ref: http://en.wikipedia.org/wiki/Mebibyte) -- Cedric BRINER Geneva - Switzerland ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
On Apr 25, 2007, at 11:17 AM, cedric briner wrote: hello the list, After reading the _excellent_ ZFS Best Practices Guide, I've seen in the section: ZFS and Complex Storage Consideration that we should configure the storage system to ignore command which will flush the memory into the disk. So does some of you knows how to tell Xserve Raid to ignore ``fsync'' requests ? After the announce that zfs will be included in Tiger, I'll be surprised that the Xserve Raid will not include such configuration. You can tell the Xserve RAID to ignore cache flush commands, but the option to make this so is controller-wide and not settable on a per- LUN basis. In the Xserve RAID management app, select a controller, click the Settings button and enter the admin password for the array. Then click the Performance tab, and make sure that the "Allow Host Cache Flushing" option is unchecked for the controllers you don't want that on. /dale ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
RE: [zfs-discuss] XServe Raid & Complex Storage Considerations
They do need to start on the "next" filesystem and it seems very ideal for Apple. If they didn't then apple will be making a huge mistake because whatever FS's exist now, zfs has already pretty much trump'd it on almost every level except for maturity. I'm expecting ZFS and ISCSI(initiator and target) in Leopard. After all, OS X borrows from FreeBSD.. FreeBSD 7 has zfs ;) Andy -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Luke Scharf Sent: Wednesday, April 25, 2007 3:00 PM To: Toby Thain Cc: [EMAIL PROTECTED] Subject: Re: [zfs-discuss] XServe Raid & Complex Storage Considerations Toby Thain wrote: > > On 25-Apr-07, at 12:17 PM, cedric briner wrote: > >> hello the list, >> >> After reading the _excellent_ ZFS Best Practices Guide, I've seen in >> the section: ZFS and Complex Storage Consideration that we should >> configure the storage system to ignore command which will flush the >> memory into the disk. >> >> So does some of you knows how to tell Xserve Raid to ignore ``fsync'' >> requests ? >> >> After the announce that zfs will be included in Tiger, > > Much as I would like to see it, I am not aware of any such > announcement from Apple, only rumours. FWIW, I heard the rumor from their sales guys. The wouldn't say whether it ZFS would be available in 10.5 or 10.6, and they wouldn't say whether it ZFS-boot would be available when ZFS is introduced -- but they did confirm that it's being worked on. -Luke ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
On Apr 25, 2007, at 10:54 AM, Andy Lubel wrote: The Xraid is a very well thought of storage device with a heck of a price point. Attached is an image of the "Settings"/"Performance" Screen where you see "Allow Host Cache Flushing". I think when you use ZFS, it would be best to uncheck that box. Yes, that's the setting you're looking for. The Xserve RAID works great with ZFS IME. -- Ben PGP.sig Description: This is a digitally signed message part ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
Toby Thain wrote: On 25-Apr-07, at 12:17 PM, cedric briner wrote: hello the list, After reading the _excellent_ ZFS Best Practices Guide, I've seen in the section: ZFS and Complex Storage Consideration that we should configure the storage system to ignore command which will flush the memory into the disk. So does some of you knows how to tell Xserve Raid to ignore ``fsync'' requests ? After the announce that zfs will be included in Tiger, Much as I would like to see it, I am not aware of any such announcement from Apple, only rumours. FWIW, I heard the rumor from their sales guys. The wouldn't say whether it ZFS would be available in 10.5 or 10.6, and they wouldn't say whether it ZFS-boot would be available when ZFS is introduced -- but they did confirm that it's being worked on. -Luke smime.p7s Description: S/MIME Cryptographic Signature ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
On 25-Apr-07, at 12:17 PM, cedric briner wrote: hello the list, After reading the _excellent_ ZFS Best Practices Guide, I've seen in the section: ZFS and Complex Storage Consideration that we should configure the storage system to ignore command which will flush the memory into the disk. So does some of you knows how to tell Xserve Raid to ignore ``fsync'' requests ? After the announce that zfs will be included in Tiger, Much as I would like to see it, I am not aware of any such announcement from Apple, only rumours. --Toby I'll be surprised that the Xserve Raid will not include such configuration. Ced. -- Cedric BRINER Geneva - Switzerland ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] XServe Raid & Complex Storage Considerations
[EMAIL PROTECTED] wrote on 04/25/2007 10:17:50 AM: > hello the list, > > After reading the _excellent_ ZFS Best Practices Guide, I've seen in the > section: ZFS and Complex Storage Consideration that we should configure > the storage system to ignore command which will flush the memory into > the disk. > > So does some of you knows how to tell Xserve Raid to ignore ``fsync'' > requests ? > > After the announce that zfs will be included in Tiger, I'll be surprised > that the Xserve Raid will not include such configuration. Xraid seems to be targeted towards pseudo cooperate customers -- the controllers are independent and do not allow for failover or mixed sets. It would not surprise me if it is not tunable with regard to cache settings (i have searched for these tunable myself). Apple seemed to just go redundant enough (power supply, fans) to make the product appear at a distance like it may fit into a reliable storage category -- but once you factor in losing half the storage to make it reliable it's cost factor is doubled. I hope that the next generation of this product line takes this into account. -Wade ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] XServe Raid & Complex Storage Considerations
hello the list, After reading the _excellent_ ZFS Best Practices Guide, I've seen in the section: ZFS and Complex Storage Consideration that we should configure the storage system to ignore command which will flush the memory into the disk. So does some of you knows how to tell Xserve Raid to ignore ``fsync'' requests ? After the announce that zfs will be included in Tiger, I'll be surprised that the Xserve Raid will not include such configuration. Ced. -- Cedric BRINER Geneva - Switzerland ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
