Re: RAID controllers
On Wed, Jul 27, 2005 at 10:13:10AM +0900, ? wrote: > A few weeks ago, I have been done some benchmark with areca and 3ware9500. > I used my own benchmark program which issue sequeuntil read and write > request. > > Result ::: > > 1 ~ 10 client : roughly areca is better than 3ware about 15%. > 10 ~20 client : almost same. > 20 ~ client : 3ware performance is stable, but areca is not draw stable > performance graph. >I think that areca raid driver is not matured That's right, the Areca driver needs work (Christoph Hellwig pointed out some issues), but Andrew Morton already put it in the -mm tree so it gets testing. > Test Environment ::: > kernel 2.4.27 stock > 2.6.12 stock I hope you didn't compare a 2.4.27 3ware kernel against a 2.6.12 areca kernel, cause in that case you're also comparing the networking, nfs, xfs, and block level code. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
- Original Message - From: "Bharath Ramesh" <[EMAIL PROTECTED]> To: "Erik Mouw" <[EMAIL PROTECTED]> Cc: "Lennart Sorensen" <[EMAIL PROTECTED]>; "Jerome Warnier" <[EMAIL PROTECTED]>; "debian-amd64" Sent: Wednesday, July 27, 2005 1:31 AM Subject: Re: RAID controllers > * Erik Mouw ([EMAIL PROTECTED]) wrote: > > On Tue, Jul 26, 2005 at 11:37:25AM -0400, Lennart Sorensen wrote: > > > On Tue, Jul 26, 2005 at 05:23:05PM +0200, Jerome Warnier wrote: > > > > Anybody here has an experience with Sil3114 or Areca RAID SATA > > > > controllers? > > > > > > > > I'm wondering which one is best on AMD64, or if I stick with a 3Ware > > > > Escalade 8600 instead. > > > > > > > > I'm planning to use Debian Sarge, of course. > > > > > > I haven't used any of them, but from what I have read, the 3ware drivers > > > are very mature and have been around for a while. The Areca drivers I > > > suspect you have to compile and install yourself (making installing > > > somewhat more difficult on one). > > > > The -mm kernels come with Areca drivers. they are at at least included > > in 2.6.13-rc3-mm1. Andrew Morton keeps a set of broken out patches, so > > you can also patch other kernels: > > > > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/broken-out/ > > > > I think you need areca-raid-linux-scsi-driver.patch and > > areca-raid-linux-scsi-driver-fix.patch (in that order). > > > > > The few benchmarks I have seen indicate the 3ware is easily the > > > fastest of them. > > > > The benchmarks in the respected german computer magazine c't suggests > > the Areca cards are faster. > > Areca according to the benchmarks is definitely a better card. I don't > remember when I read but I did review of a bunch of RAID controllers > done under Linux. Depending on you need you would need to decide if you > want to use a host based or an intelligent RAID controller. I would > personally go with the intelligent RAID controller. The advantage of > using Areca is that they have native SATA support unlike 3ware or > adaptec which have their proprietary crap which is still light years > behind. You don't get the bang for the money. But if you want tried and > tested RAID controller I would go with the 3ware/adaptec. If you are > going towards a host based controller I would suggest looking at the > Raid Core BC 4852 controller. Its supposed to be really good, not sure > about the linux support. > > Bharath > > --- > Bharath Ramesh <[EMAIL PROTECTED]> > http://csgrad.cs.vt.edu/~bramesh > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > A few weeks ago, I have been done some benchmark with areca and 3ware9500. I used my own benchmark program which issue sequeuntil read and write request. Result ::: 1 ~ 10 client : roughly areca is better than 3ware about 15%. 10 ~20 client : almost same. 20 ~ client : 3ware performance is stable, but areca is not draw stable performance graph. I think that areca raid driver is not matured Test Environment ::: kernel 2.4.27 stock 2.6.12 stock filesystem xfs network protocol : NFS nfs client : 2.4.21 architeture : Intel xeon 2.4GHz memory : 2G
Re: RAID controllers
* Erik Mouw ([EMAIL PROTECTED]) wrote: > On Tue, Jul 26, 2005 at 11:37:25AM -0400, Lennart Sorensen wrote: > > On Tue, Jul 26, 2005 at 05:23:05PM +0200, Jerome Warnier wrote: > > > Anybody here has an experience with Sil3114 or Areca RAID SATA > > > controllers? > > > > > > I'm wondering which one is best on AMD64, or if I stick with a 3Ware > > > Escalade 8600 instead. > > > > > > I'm planning to use Debian Sarge, of course. > > > > I haven't used any of them, but from what I have read, the 3ware drivers > > are very mature and have been around for a while. The Areca drivers I > > suspect you have to compile and install yourself (making installing > > somewhat more difficult on one). > > The -mm kernels come with Areca drivers. they are at at least included > in 2.6.13-rc3-mm1. Andrew Morton keeps a set of broken out patches, so > you can also patch other kernels: > > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/broken-out/ > > I think you need areca-raid-linux-scsi-driver.patch and > areca-raid-linux-scsi-driver-fix.patch (in that order). > > > The few benchmarks I have seen indicate the 3ware is easily the > > fastest of them. > > The benchmarks in the respected german computer magazine c't suggests > the Areca cards are faster. Areca according to the benchmarks is definitely a better card. I don't remember when I read but I did review of a bunch of RAID controllers done under Linux. Depending on you need you would need to decide if you want to use a host based or an intelligent RAID controller. I would personally go with the intelligent RAID controller. The advantage of using Areca is that they have native SATA support unlike 3ware or adaptec which have their proprietary crap which is still light years behind. You don't get the bang for the money. But if you want tried and tested RAID controller I would go with the 3ware/adaptec. If you are going towards a host based controller I would suggest looking at the Raid Core BC 4852 controller. Its supposed to be really good, not sure about the linux support. Bharath --- Bharath Ramesh <[EMAIL PROTECTED]> http://csgrad.cs.vt.edu/~bramesh -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Lennart Sorensen a écrit : > On Tue, Jul 26, 2005 at 05:23:05PM +0200, Jerome Warnier wrote: > >>Anybody here has an experience with Sil3114 or Areca RAID SATA >>controllers? >> >>I'm wondering which one is best on AMD64, or if I stick with a 3Ware >>Escalade 8600 instead. >> >>I'm planning to use Debian Sarge, of course. > > > I haven't used any of them, but from what I have read, the 3ware drivers > are very mature and have been around for a while. The Areca drivers I > suspect you have to compile and install yourself (making installing > somewhat more difficult on one). The few benchmarks I have seen > indicate the 3ware is easily the fastest of them. well my experience with 3ware 8xxx tells the exact contrary, their RAID5 sucks as hell. With 2 of these cards with many new Maxtor drives, I was changing a hard drive every week ! I won't tell you how many times it totally broke after a hard drive failure. It never was able to reconstruct a working array after a failure. Even 3ware developers were unable to help me , though we had long mails for testing stuff. I also stopped counting _hard_ freeze crash after the 2nd week (especially on amd64...). since, I switched to linux software raid5 and raid6 over Sil3114 chipsets and 3ware cards recycled in JBOD mode (passthrough mode), I have changed two disks in 6 months and it went smoothly. > > The Sil3114 is of course NOT a hardware raid controller. It is > proprietary software raid, and really not recomended in general. dmraid > is not well supported yet, which is what you would need to use that > stuff. their own raid is probably not recommended, linux software raid works like a charm over it. (using raid6 and 5 at work). my (own and personal) conclusion is that 3ware's cards (and probably no single hard raid card) beats linux software implementation both in stability and performance. just my 2c. Cheers, Mik > > Len Sorensen > > -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFC5l3IyOYzc4nQ8j0RApSSAKCHr2USQCSG6nEeQMY3YHLb3qcEFQCfchwv o+jHTdbv1XWUPxEMIM9C2UI= =54lM -END PGP SIGNATURE- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
On Tue, Jul 26, 2005 at 06:12:19PM +0200, Erik Mouw wrote: > The -mm kernels come with Areca drivers. they are at at least included > in 2.6.13-rc3-mm1. Andrew Morton keeps a set of broken out patches, so > you can also patch other kernels: > > http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/broken-out/ > > I think you need areca-raid-linux-scsi-driver.patch and > areca-raid-linux-scsi-driver-fix.patch (in that order). Well nice to see someone else getting into the linux business. > The benchmarks in the respected german computer magazine c't suggests > the Areca cards are faster. All the benchmarks I have seen were run on windows, so who knows what to make of those. :) Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
On Tue, Jul 26, 2005 at 11:37:25AM -0400, Lennart Sorensen wrote: > On Tue, Jul 26, 2005 at 05:23:05PM +0200, Jerome Warnier wrote: > > Anybody here has an experience with Sil3114 or Areca RAID SATA > > controllers? > > > > I'm wondering which one is best on AMD64, or if I stick with a 3Ware > > Escalade 8600 instead. > > > > I'm planning to use Debian Sarge, of course. > > I haven't used any of them, but from what I have read, the 3ware drivers > are very mature and have been around for a while. The Areca drivers I > suspect you have to compile and install yourself (making installing > somewhat more difficult on one). The -mm kernels come with Areca drivers. they are at at least included in 2.6.13-rc3-mm1. Andrew Morton keeps a set of broken out patches, so you can also patch other kernels: http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/broken-out/ I think you need areca-raid-linux-scsi-driver.patch and areca-raid-linux-scsi-driver-fix.patch (in that order). > The few benchmarks I have seen indicate the 3ware is easily the > fastest of them. The benchmarks in the respected german computer magazine c't suggests the Areca cards are faster. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
* Jerome Warnier ([EMAIL PROTECTED]) wrote: > Anybody here has an experience with Sil3114 or Areca RAID SATA > controllers? > > I'm wondering which one is best on AMD64, or if I stick with a 3Ware > Escalade 8600 instead. We have the 3ware Escalade 8600 in our storage server and their Linux support is really good. The 3ware disk monitor system they have is also supports amd64, it has nice web interface from which you can do all needed maintenance on the RAID. If you have the extra money I would buy the 3ware 9500 series controller instead. They have a some extra features like support multiple cards. Bharath --- Bharath Ramesh <[EMAIL PROTECTED]> http://csgrad.cs.vt.edu/~bramesh -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
On Tue, Jul 26, 2005 at 05:59:07PM +0200, Mickael Marchand wrote: > well my experience with 3ware 8xxx tells the exact contrary, > their RAID5 sucks as hell. With 2 of these cards with many new Maxtor > drives, I was changing a hard drive every week ! > I won't tell you how many times it totally broke after a hard drive > failure. It never was able to reconstruct a working array after a failure. > Even 3ware developers were unable to help me , though we had long mails > for testing stuff. > I also stopped counting _hard_ freeze crash after the 2nd week > (especially on amd64...). > > since, I switched to linux software raid5 and raid6 over Sil3114 > chipsets and 3ware cards recycled in JBOD mode (passthrough mode), I > have changed two disks in 6 months and it went smoothly. Certainly sounds weird. Many other people swear by the 3ware cards. I have also talked to people that say they just use them as very nice high port count sata controllers and run md raid on them to get the fastest performance. > their own raid is probably not recommended, > linux software raid works like a charm over it. (using raid6 and 5 at work). Well anything you can treat as just an ide/sata controller is always nice as long as the drivers for for it in linux. > my (own and personal) conclusion is that 3ware's cards (and probably no > single hard raid card) beats linux software implementation both in > stability and performance. Given modern cpu speeds, I suspect that is probably true. Personally I run md raid1. My experience with IBM ServeRaid 4 cards is not impresive performance wise. Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: RAID controllers
On Tue, Jul 26, 2005 at 05:23:05PM +0200, Jerome Warnier wrote: > Anybody here has an experience with Sil3114 or Areca RAID SATA > controllers? > > I'm wondering which one is best on AMD64, or if I stick with a 3Ware > Escalade 8600 instead. > > I'm planning to use Debian Sarge, of course. I haven't used any of them, but from what I have read, the 3ware drivers are very mature and have been around for a while. The Areca drivers I suspect you have to compile and install yourself (making installing somewhat more difficult on one). The few benchmarks I have seen indicate the 3ware is easily the fastest of them. The Sil3114 is of course NOT a hardware raid controller. It is proprietary software raid, and really not recomended in general. dmraid is not well supported yet, which is what you would need to use that stuff. Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
