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I have a Dell PowerEdge 2950 and am looking to add more storage. I know a lot of factors can go into the type of answer given, but for present and future technology planning, should I look for a rack of SATA, SCSI, or fibre channel drives? Maybe I'm dating myself with fibre channel, and possibly SCSI? I may be looking to add a few TB now, and possibly more later. What are people

I''m sorry guys. I''m really still such a newbie at this. i''ve been having trouble getting my Rails apps to run on Dreamhost, and I think it might be a problem with the database connection. Anyway, I read on Code Snippets that I should do this: [rhod]$ ruby -Iconfig -renvironment -e "p ActiveRecord::Base.connection" to find out if my database.yml file is connecting properly. This is the result i got: /usr/lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/mysql_adapter.rb:331:in `real_connect''...

On 03/10/2014 04:03 PM, Michael S. Tsirkin wrote: > On Fri, Mar 07, 2014 at 01:28:27PM +0800, Jason Wang wrote: >> > We used to stop the handling of tx when the number of pending DMAs >> > exceeds VHOST_MAX_PEND. This is used to reduce the memory occupation >> > of both host and guest. But it was too aggressive in some cases, since >> > any delay or blocking

On 03/10/2014 04:03 PM, Michael S. Tsirkin wrote: > On Fri, Mar 07, 2014 at 01:28:27PM +0800, Jason Wang wrote: >> > We used to stop the handling of tx when the number of pending DMAs >> > exceeds VHOST_MAX_PEND. This is used to reduce the memory occupation >> > of both host and guest. But it was too aggressive in some cases, since >> > any delay or blocking

On 11/13/2013 04:19 PM, Eric Dumazet wrote: > On Wed, 2013-11-13 at 10:47 +0200, Ronen Hod wrote: > >> I looked at how ewma works, and although it is computationally efficient, >> and it does what it is supposed to do, initially (at the first samples) it is strongly >> biased towards the value that was added at the first ewma_add. >> I suggest that you print the

On 11/13/2013 04:19 PM, Eric Dumazet wrote: > On Wed, 2013-11-13 at 10:47 +0200, Ronen Hod wrote: > >> I looked at how ewma works, and although it is computationally efficient, >> and it does what it is supposed to do, initially (at the first samples) it is strongly >> biased towards the value that was added at the first ewma_add. >> I suggest that you print the

On 03/13/2014 09:28 AM, Jason Wang wrote: > On 03/10/2014 04:03 PM, Michael S. Tsirkin wrote: >> On Fri, Mar 07, 2014 at 01:28:27PM +0800, Jason Wang wrote: >>>> We used to stop the handling of tx when the number of pending DMAs >>>> exceeds VHOST_MAX_PEND. This is used to reduce the memory occupation >>>> of both host and guest. But it was too

On 11/13/2013 12:21 AM, Michael Dalton wrote: > Commit 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag > allocators") changed the mergeable receive buffer size from PAGE_SIZE to > MTU-size, introducing a single-stream regression for benchmarks with large > average packet size. There is no single optimal buffer size for all workloads. > For workloads

On 11/13/2013 12:21 AM, Michael Dalton wrote: > Commit 2613af0ed18a ("virtio_net: migrate mergeable rx buffers to page frag > allocators") changed the mergeable receive buffer size from PAGE_SIZE to > MTU-size, introducing a single-stream regression for benchmarks with large > average packet size. There is no single optimal buffer size for all workloads. > For workloads