Re: [Openstack] Swift on RHEL/CentOS in prod?

2012-01-11 Thread Rustam Aliyev
@lists.launchpad.net] *On Behalf Of *Rustam Aliyev *Sent:* 10 January 2012 16:49 *To:* openstack@lists.launchpad.net *Subject:* Re: [Openstack] Swift on RHEL/CentOS in prod? Hi Armando, Thanks for sharing your experience. It's interesting to hear that you run 5.5. My problem is Swift

Re: [Openstack] Swift on RHEL/CentOS in prod?

2012-01-10 Thread Rustam Aliyev
-bounces+armando.migliaccio=eu.citrix@lists.launchpad.net] *On Behalf Of *Rustam Aliyev *Sent:* 22 December 2011 11:08 *To:* openstack@lists.launchpad.net *Subject:* [Openstack] Swift on RHEL/CentOS in prod? Hi, I was wondering if anyone uses Swift on RHEL/CentOS in production? If yes, which

Re: [Openstack] Swift slow write performance

2011-12-22 Thread Rustam Aliyev
iPhone 在 2011-12-20，19:13，Rustam Aliyev rus...@code.az mailto:rus...@code.az 写道： Hi Mike, Thanks, I didn't know that PUT operation also includes updating replica containers. That makes sense. I will check that. In the mean time I've added debug checkpoints into PUT operation to measure

[Openstack] Swift on RHEL/CentOS in prod?

2011-12-22 Thread Rustam Aliyev
Hi, I was wondering if anyone uses Swift on RHEL/CentOS in production? If yes, which version of RHEL/CentOS you are using? Thanks, Rustam. ___ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe :

Re: [Openstack] Swift slow write performance

2011-12-20 Thread Rustam Aliyev
Hi Mike, Thanks, I didn't know that PUT operation also includes updating replica containers. That makes sense. I will check that. In the mean time I've added debug checkpoints into PUT operation to measure different steps. Modified code is here: http://paste.openstack.org/show/3899/

Re: [Openstack] Swift slow write performance

2011-12-19 Thread Rustam Aliyev
Hi All, Right now I tried everything, but PUT speed remains very slow. In order to speedup I tried various combination of workers, disabled disk mount check, enabled DEBUG log level, checked source code to understand logic, finally added another node. No errors, and I was able only to squeeze

[Openstack] Swift maximum recommended objects per container

2011-12-15 Thread Rustam Aliyev
Hi, While searching for the swift performance tuning tips I came across this post: http://adrianotto.com/2010/09/openstack-os-is-great-for/ In the comments, some users mention that it's better to keep max. number of objects per container less than 1M. As far as I understood, this is mainly

Re: [Openstack] Swift maximum recommended objects per container

2011-12-15 Thread Rustam Aliyev
Just for reference, question was answered here: https://answers.launchpad.net/swift/+question/181977 On 15/12/2011 10:02, Rustam Aliyev wrote: Hi, While searching for the swift performance tuning tips I came across this post: http://adrianotto.com/2010/09/openstack-os-is-great

[Openstack] Swift slow write performance

2011-12-15 Thread Rustam Aliyev
Hi, I'm testing swift 1.4.4 setup with 4 nodes/zones on RHEL 5.7. I ran into the problem of slow writes. Using swift-bench we generated load, writing hundreds of 4K files. Results: - Writes - ~3 PUTs/sec (very slow) - Reads - ~25 GETs/sec (ok) It's clear that writes are not limited by I/O.