Re: SSD as Cache?

2013-11-12 Thread basti
the performance of my Webapplication. The Cache is about 10.0 GB in 200 files. Can this cache moved to SSD? Which cache are we talking about? Where is the cache currently? On 11/08/2013 03:46 PM, Karl E. Jorgensen wrote: Standard practice for tuning is to make measurements first

SSD as Cache?

2013-11-08 Thread basti
Hello, on my Webservers, I have 1x 128GB SSD and a Raid 1 (1TB). Now I plan to improve the performance of my Webapplication. The Cache is about 10.0 GB in 200 files. Can this cache moved to SSD? Months ago I read articles about SSD and Flash Memory like: - Disable logging on SSD - Disable

Re: SSD as Cache?

2013-11-08 Thread Paul Johnson
On Fri, Nov 8, 2013 at 8:12 AM, basti black.flederm...@arcor.de wrote: Can this cache moved to SSD? Months ago I read articles about SSD and Flash Memory like: - Disable logging on SSD - Disable cache on SSD - Don't swap on SSD ... And today? How long will the SSD work without data loss

Re: SSD as Cache?

2013-11-08 Thread Jochen Spieker
Paul Johnson: On Fri, Nov 8, 2013 at 8:12 AM, basti black.flederm...@arcor.de wrote: Can this cache moved to SSD? Months ago I read articles about SSD and Flash Memory like: - Disable logging on SSD - Disable cache on SSD - Don't swap on SSD ... And today? How long will the SSD work

Re: SSD as Cache?

2013-11-08 Thread Martin Steigerwald
Hi Jochen, hi Paul, Am Freitag, 8. November 2013, 17:24:22 schrieb Jochen Spieker: Paul Johnson: On Fri, Nov 8, 2013 at 8:12 AM, basti black.flederm...@arcor.de wrote: Can this cache moved to SSD? Months ago I read articles about SSD and Flash Memory like: - Disable logging on SSD

Re: SSD as Cache?

2013-11-08 Thread Neal Murphy
On Friday, November 08, 2013 09:12:08 AM basti wrote: Hello, on my Webservers, I have 1x 128GB SSD and a Raid 1 (1TB). Now I plan to improve the performance of my Webapplication. The Cache is about 10.0 GB in 200 files. Can this cache moved to SSD? Months ago I read articles about

Re: SSD as Cache?

2013-11-08 Thread David Christensen
for this purpose. If your cache is not on such already (e.g. two 1 TB desktop HDD with LVM RAID 1 and default ext4 files system), this may be your bottleneck. Can this cache moved to SSD? I would think so, if the application allows it and there is room on the SSD. Months ago I read

Re: SSD as Cache?

2013-11-08 Thread basti
created/ tuned for this purpose. If your cache is not on such already (e.g. two 1 TB desktop HDD with LVM RAID 1 and default ext4 files system), this may be your bottleneck. Can this cache moved to SSD? I would think so, if the application allows it and there is room on the SSD

Re: SSD as Cache?

2013-11-08 Thread David Christensen
On 11/08/2013 09:39 AM, Neal Murphy wrote: Using the -noatime mount option will extend the lifetime of the SSD. Assuming the application cache doesn't need atime, noatime should help application performance on any type of drive. If the application cache is on the same partition as other

Re: SSD as Cache?

2013-11-08 Thread Karl E. Jorgensen
Hi On Fri, Nov 08, 2013 at 03:12:08PM +0100, basti wrote: Hello, on my Webservers, I have 1x 128GB SSD and a Raid 1 (1TB). Now I plan to improve the performance of my Webapplication. The Cache is about 10.0 GB in 200 files. Can this cache moved to SSD? Months ago I read articles

Re: SSD as Cache?

2013-11-08 Thread David Christensen
files. Can this cache moved to SSD? Which cache are we talking about? Where is the cache currently? On 11/08/2013 03:46 PM, Karl E. Jorgensen wrote: Standard practice for tuning is to make measurements first. If your measurements show that disk IO is your bottleneck, then yes: SSD may help

Re: SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-15 Thread Matijs van Zuijlen
On 05/14/2012 10:29 AM, Winfried Tilanus wrote: On 05/14/2012 10:23 AM, Wouter Verhelst wrote: Hoi, In plaats daarvan zou ik je HDD ergens mounten waar die niet constant actief moet zijn, zodat je je grote bestanden met symlinks (of beter nog, met git-annex) beschikbaar kunt maken wanneer

Re: SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-14 Thread Matijs van Zuijlen
On 05/11/2012 01:22 PM, Winfried Tilanus wrote: On 05/11/2012 11:04 AM, Matijs van Zuijlen wrote: Hoi, Gebruik je de features van ZFS voor de write cache of is het iets dat ook onder Linux werkt? Ik weet niet hoe het bij ext3/ext4 is, maar bij JFS kan je het journal op een aparte locatie

Re: SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-14 Thread Wouter Verhelst
On Mon, May 14, 2012 at 08:55:34AM +0200, Matijs van Zuijlen wrote: On 05/11/2012 01:22 PM, Winfried Tilanus wrote: On 05/11/2012 11:04 AM, Matijs van Zuijlen wrote: Hoi, Gebruik je de features van ZFS voor de write cache of is het iets dat ook onder Linux werkt? Ik weet niet hoe het

Re: SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-14 Thread Winfried Tilanus
On 05/14/2012 10:23 AM, Wouter Verhelst wrote: Hoi, In plaats daarvan zou ik je HDD ergens mounten waar die niet constant actief moet zijn, zodat je je grote bestanden met symlinks (of beter nog, met git-annex) beschikbaar kunt maken wanneer nodig. Dat laat toe dat je hard disk een spindown

SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-11 Thread Matijs van Zuijlen
draait op een LSI HBA controller en is rete snel qua lezen (15 entry points) en schrijven (5 entry points). Daarnaast nog 2 SSD's voor write cache. Toevallig ben ik onderzoek aan het doen naar write cache op SSD, omdat ik van plan ben een Samsung laptop aan te schaffen die is uitgerust met 16GB SSD

Re: SSD write cache [was: Re: MoboRAID Boot Partitie]

2012-05-11 Thread Mark Stunnenberg
) maken en die weer stripen (RAID0). Dit alles draait op een LSI HBA controller en is rete snel qua lezen (15 entry points) en schrijven (5 entry points). Daarnaast nog 2 SSD's voor write cache. Toevallig ben ik onderzoek aan het doen naar write cache op SSD, omdat ik van plan ben een Samsung laptop