Offtopic: Which SAS / SATA HBA do you recommend?
Hi all, Sorry for the offtopic question. I hope though that others on this list or reading the archive find the answers useful too. It seems the Adaptec 1405 4port SAS HBA I bought only works with RHEL and SuSE through a closed source driver, and thus is quite useless :-( I was stupid enought to think Works with RHEL and SuSE meant Certified for RHEL and SuSE, but driver in mainstream kernel .. What SAS (or SATA) controller do you use or recommend in combination with a SSD and BTRFS? I'm looking for a non-RAID controller with four or eight ports and of course full Linux support. Currently I have a 8x 2.5 SAS/SATA chassis and two Intel X25-E 64GB drivers which will have a BTRFS RAID0 filesystem. I already have a Marvell MV88SX6081 eight port SATA controller, but it has no free ports and is pretty old. With kind regards, Sander -- Humilis IT Services and Solutions http://www.humilis.net -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Offtopic: Which SAS / SATA HBA do you recommend?
On 20. juli. 2009, at 11.28, Sander wrote: Hi all, Sorry for the offtopic question. I hope though that others on this list or reading the archive find the answers useful too. try this. they're supposed to be good, so long that you don't need hardware RAID. Sun uses the same chipset in their opensolaris-based storage solution http://www.newegg.com/Product/Product.aspx?Item=N82E16815121009 roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] Fix corner case in btrfs_next_leaf
if 1 is returned by btrfs_search_slot, the path already points to the
first item with 'key searching key'. So increasing path-slots[0] by
one is superfluous in that case.
Signed-off-by: Yan Zheng zheng@oracle.com
---
diff -urp 1/fs/btrfs/ctree.c 2/fs/btrfs/ctree.c
--- 1/fs/btrfs/ctree.c 2009-07-17 16:05:20.583924545 +0800
+++ 2/fs/btrfs/ctree.c 2009-07-20 14:52:49.715697336 +0800
@@ -4146,7 +4175,8 @@ again:
* advance the path if there are now more items available.
*/
if (nritems 0 path-slots[0] nritems - 1) {
- path-slots[0]++;
+ if (ret == 0)
+ path-slots[0]++;
ret = 0;
goto done;
}
--
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Re: Offtopic: Which SAS / SATA HBA do you recommend?
S?bastien Wacquiez wrote (ao): Sander wrote: What SAS (or SATA) controller do you use or recommend in combination with a SSD and BTRFS? I'm looking for a non-RAID controller with four or eight ports and of course full Linux support. I don't have any ssd yet, but if you want cheap card without hardware raid, you could look at those : http://www.supermicro.com/products/accessories/addon/AOC-USASLP-L8i.cfm http://www.supermicro.com/products/accessories/addon/AOC-USAS-L8i.cfm You'll need to revert the bracket as they're designed to be in a supermicro UIO slot (In fact, they are just standart PCIe card upside down). They use the mptsas driver in linux which works ok for a long time, and can be found for ~ 130$. It work pretty fast (~ 800 Mo/s with a 8 drives raid10f2 in my brand new nehalem server). You can also find this one for ~ 120 bucks : http://www.supermicro.com/products/accessories/addon/AOC-SASLP-MV8.cfm No proprietary slot this time, the chipset is supported in 2.6.30 (but I haven't tested it yet) via the mvsas drivers. Hope you find this usefull. Very useful, much appreciated, thanks! I think I go for a Marvell based controller (again), as Marvell chips seem to have quite a history when it comes to open source drivers. No more Adaptec .. Thanks again Sebastien. With kind regards, Sander -- Humilis IT Services and Solutions http://www.humilis.net -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Random write regression
Finally got around to going through latest data. Seems like we lost all the random write performance gains. Creates are better, but total regression on the random workload. Sequential reads seem to have dropped as well. Results are uploading now. http://btrfs.boxacle.net/repository/raid/history/History.html These are for RAID only as single disk system still having issues completing btrfs runs. Also, missing oprofile duw to oprofile causing an NMI and killing the system. Chris, this was built on 7/6, but I see no new changes sine 7/2/. Steve -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Random write regression
Chris Mason wrote: On Mon, Jul 20, 2009 at 08:11:42AM -0500, Steven Pratt wrote: Finally got around to going through latest data. Seems like we lost all the random write performance gains. Creates are better, but total regression on the random workload. Sequential reads seem to have dropped as well. Interesting, was this filesystem freshly created? Yes, alway mkfs before the runs. Steve -chris -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
