Re: [zfs-discuss] Running on Dell hardware?

'Tim Cook' wrote: [... snip ... ] Dell requires Dell branded drives as of roughly 8 months ago. I don't think there was ever an H700 firmware released that didn't require this. I'd bet you're going to waste a lot of money to get a drive the system refuses to recognize. This should no longer

Re: [zfs-discuss] Performance issues with iSCSI under Linux

Tim Cook wrote: On Fri, Oct 22, 2010 at 10:40 PM, Haudy Kazemi > wrote: One thing suspicious is that we notice a slow down of one pool when the other is under load. How can that be? Ian A network switch that is being maxed o

Re: [zfs-discuss] Performance issues with iSCSI under Linux

What more info could you provide? Quite a lot more, actually, like: how many streams of SQL and copy are you running? how are the filesystems/zvols configured (recordsize, etc)? some CPU, VM and network stats would also be nice. Based on the nexenta iostats you've provided (a tiny window on what

Re: [zfs-discuss] Changing vdev controller

> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Dave > > I have a 14 drive pool, in a 2x 7 drive raidz2, with l2arc and slog > devices attached. > I had a port go bad on one of my controllers (both are sat2-mv8), so I > need to replace it (I

Re: [zfs-discuss] Running on Dell hardware?

On Fri, Oct 22, 2010 at 10:53 PM, Edward Ned Harvey wrote: > > From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > > boun...@opensolaris.org] On Behalf Of Kyle McDonald > > > > I'm currently considering purchasing 1 or 2 Dell R515's. > > > > With up to 14 drives, and up to 64GB of RAM

Re: [zfs-discuss] Performance issues with iSCSI under Linux

On Fri, Oct 22, 2010 at 10:40 PM, Haudy Kazemi wrote: > > >> One thing suspicious is that we notice a slow down of one pool when the >> other is under load. How can that be? >> >> Ian >> >> > A network switch that is being maxed out? Some switches cannot switch at > rated line speed on all thei

Re: [zfs-discuss] Running on Dell hardware?

> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Kyle McDonald > > I'm currently considering purchasing 1 or 2 Dell R515's. > > With up to 14 drives, and up to 64GB of RAM, it seems like it's well > suited > for a low-end ZFS server. > > I

Re: [zfs-discuss] vdev failure -> pool loss ?

Bob Friesenhahn wrote: On Tue, 19 Oct 2010, Cindy Swearingen wrote: unless you use copies=2 or 3, in which case your data is still safe for those datasets that have this option set. This advice is a little too optimistic. Increasing the copies property value on datasets might help in some fai

Re: [zfs-discuss] Newbie ZFS Question: RAM for Dedup

Never Best wrote: Sorry I couldn't find this anywhere yet. For deduping it is best to have the lookup table in RAM, but I wasn't too sure how much RAM is suggested? ::Assuming 128KB Block Sizes, and 100% unique data: 1TB*1024*1024*1024/128 = 8388608 Blocks ::Each Block needs 8 byte pointer? 83

Re: [zfs-discuss] Performance issues with iSCSI under Linux

One thing suspicious is that we notice a slow down of one pool when the other is under load. How can that be? Ian A network switch that is being maxed out? Some switches cannot switch at rated line speed on all their ports all at the same time. Their internal buses simply don't have t

Re: [zfs-discuss] How does dedup work over iSCSI?

Neil Perrin wrote: On 10/22/10 15:34, Peter Taps wrote: Folks, Let's say I have a volume being shared over iSCSI. The dedup has been turned on. Let's say I copy the same file twice under different names at the initiator end. Let's say each file ends up taking 5 blocks. For dedupe to work,

[zfs-discuss] Changing vdev controller

I have a 14 drive pool, in a 2x 7 drive raidz2, with l2arc and slog devices attached. I had a port go bad on one of my controllers (both are sat2-mv8), so I need to replace it (I have no spare ports on either card). My spare controller is a LSI 1068 based 8 port card. My plan is to remove the

Re: [zfs-discuss] How does dedup work over iSCSI?

On 10/22/10 17:28, Peter Taps wrote: Hi Neil, if the file offset does not match, the chances that the checksum would match, especially sha256, is almost 0. May be I am missing something. Let's say I have a file that contains 11 letters - ABCDEFGHIJK. Let's say the block size is 5. For the fi

Re: [zfs-discuss] Running on Dell hardware?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi All, I'm currently considering purchasing 1 or 2 Dell R515's. With up to 14 drives, and up to 64GB of RAM, it seems like it's well suited for a low-end ZFS server. I know this box is new, but I wonder if anyone out there has any experience with

Re: [zfs-discuss] How does dedup work over iSCSI?

Hi Neil, if the file offset does not match, the chances that the checksum would match, especially sha256, is almost 0. May be I am missing something. Let's say I have a file that contains 11 letters - ABCDEFGHIJK. Let's say the block size is 5. For the first file, the block contents are "ABCDE

Re: [zfs-discuss] How does dedup work over iSCSI?

On 10/22/10 15:34, Peter Taps wrote: Folks, Let's say I have a volume being shared over iSCSI. The dedup has been turned on. Let's say I copy the same file twice under different names at the initiator end. Let's say each file ends up taking 5 blocks. For dedupe to work, each block for a file

[zfs-discuss] How does dedup work over iSCSI?

Folks, Let's say I have a volume being shared over iSCSI. The dedup has been turned on. Let's say I copy the same file twice under different names at the initiator end. Let's say each file ends up taking 5 blocks. For dedupe to work, each block for a file must match the corresponding block fro

Re: [zfs-discuss] Running on Dell hardware?

On Wed, Oct 13 at 15:44, Edward Ned Harvey wrote: From: Henrik Johansen [mailto:hen...@scannet.dk] The 10g models are stable - especially the R905's are real workhorses. You would generally consider all your machines stable now? Can you easily pdsh to all those machines? kstat | grep current_

Re: [zfs-discuss] Performance issues with iSCSI under Linux

Some numbers... zpool status pool: Pool_sas state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM Pool_sas ONLINE 0 0 0 c4t5000C506A6D3d0 ONLINE 0 0 0 c4t5000C506

Re: [zfs-discuss] Does a zvol use the zil?

> "re" == Richard Elling writes: re> The risk here is not really different that that faced by re> normal disk drives which have nonvolatile buffers (eg re> virtually all HDDs and some SSDs). This is why applications re> can send cache flush commands when they need to ensure t

Re: [zfs-discuss] Shared LUN's and ZFS

On Fri, October 22, 2010 08:07, Tony MacDoodle wrote: > Is it possible to have a shared LUN between 2 servers using zfs? The > server can see both LUN's but when I do an impoer I get: [...] > When I do import it using the -f I can't see the files created on the > other node. No, it is not possibl

Re: [zfs-discuss] Shared LUN's and ZFS

Hi Tony, Am 22.10.10 14:07, schrieb Tony MacDoodle: Is it possible to have a shared LUN between 2 servers using zfs? The server can see both LUN's but when I do an impoer I get: bash-3.00# zpool import pool: logs id: 3700399958960377217 state: ONLINE status: The pool was last accessed by ano

[zfs-discuss] Shared LUN's and ZFS

Is it possible to have a shared LUN between 2 servers using zfs? The server can see both LUN's but when I do an impoer I get: bash-3.00# zpool import pool: logs id: 3700399958960377217 state: ONLINE status: The pool was last accessed by another system. action: The pool can be imported using its

Re: [zfs-discuss] how to upgrade

On 10/22/2010 1:51 AM, sridhar surampudi wrote: Hi, zfs upgrade shows version as 4 and zpool upgrade shows version as 15. and etc/release show Solaris 10 10/09 s10s_u8wos_08a SPARC. And my zpool doen't have support for split. Could you please suggest me how to upgrade my Solaris box with lat

[zfs-discuss] how to upgrade

Hi, zfs upgrade shows version as 4 and zpool upgrade shows version as 15. and etc/release show Solaris 10 10/09 s10s_u8wos_08a SPARC. And my zpool doen't have support for split. Could you please suggest me how to upgrade my Solaris box with latest version for zfs and zpool to get updated supp