Re: PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
On 2013-04-25 7:44 AM, Pandu Poluan wrote: On Apr 25, 2013 5:54 PM, "Tanstaafl" wrote: On 2013-04-24 10:23 PM, Pandu Poluan wrote: My Gentoo VMs in the cloud (using VMware's vCloud) uses PV-SCSI. It's stable... but kind of sensitive: Everytime the cloud provider do something with their storage, my VMs become Read-Only. Ouch... so, how do you fix it? For the Read-Only problem, a simple reboot suffices. But I made sure to fire an angry email to the Customer Support, telling them in no uncertain terms that the next time they want to do something re: their storage, they contact me first. Interesting... thanks for the heads up, but since this is on my own host, I won't need to worry about this.
Re: PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
On Apr 25, 2013 5:54 PM, "Tanstaafl" wrote: > > On 2013-04-24 10:23 PM, Pandu Poluan wrote: >> >> My Gentoo VMs in the cloud (using VMware's vCloud) uses PV-SCSI. It's >> stable... but kind of sensitive: Everytime the cloud provider do >> something with their storage, my VMs become Read-Only. > > > Ouch... so, how do you fix it? > For the Read-Only problem, a simple reboot suffices. But I made sure to fire an angry email to the Customer Support, telling them in no uncertain terms that the next time they want to do something re: their storage, they contact me first. So, when the time comes for then to do some storage management things, they tell me exactly at what time. I scheduled the VMs to shut down at the agreed time, and turn them back on as soon as they text me that their maintenance had finished. Only one VM I left on, the "gatewall" VM. And every single time the gatewall VM detected that something is being done on the storage level, and changed to a Read-Only mode. I consider myself lucky that when the 'problem' manifested itself, the VMs are not yet in Production. And no corruption happened. (PS: Strangely enough, the RO switch happens only on Gentoo VMs; the FreeBSD VMs and Debian VMs are unaffected. Maybe because I've pared down each and every Gentoo VM to their bare minimum, so they are much more responsive) Rgds, --
Re: PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
On 2013-04-24 10:23 PM, Pandu Poluan wrote: My Gentoo VMs in the cloud (using VMware's vCloud) uses PV-SCSI. It's stable... but kind of sensitive: Everytime the cloud provider do something with their storage, my VMs become Read-Only. Ouch... so, how do you fix it?
Re: PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
On Apr 24, 2013 2:29 AM, "Tanstaafl" wrote: > > On 2013-04-22 8:56 AM, Andre Lucas Falco wrote: >> >> 2013/4/21 Tanstaafl wrote: >>> >>> Windows VMs see get an 'LSI Logic SAS', and my gentoo VM gets an >>> 'LSI Logic Parallel' controller. > > >> Did you tested using pvscsi? It's improve performance with less cost to >> CPU usage. > > > No, I didn't... > > It appears there is pvscsi support in the mainline linux kernel, but is it rock-solid? Anyone else here running gentoo linux with this driver for their primary/boot disk controller? > > Also, for my windows server 2008r2 vms, I used the default, which was the LSI SAS... I did search and found the knowledgebase article describing how to change them, but is the gain really worth the trouble (and more importantly, the risk)? > My Gentoo VMs in the cloud (using VMware's vCloud) uses PV-SCSI. It's stable... but kind of sensitive: Everytime the cloud provider do something with their storage, my VMs become Read-Only. Other than that, performance is good, no fs corruption, etc. Rgds, --
Re: PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
Anyone? On 2013-04-23 3:28 PM, Tanstaafl wrote: On 2013-04-22 8:56 AM, Andre Lucas Falco wrote: 2013/4/21 Tanstaafl wrote: Windows VMs see get an 'LSI Logic SAS', and my gentoo VM gets an 'LSI Logic Parallel' controller. Did you tested using pvscsi? It's improve performance with less cost to CPU usage. No, I didn't... It appears there is pvscsi support in the mainline linux kernel, but is it rock-solid? Anyone else here running gentoo linux with this driver for their primary/boot disk controller? Also, for my windows server 2008r2 vms, I used the default, which was the LSI SAS... I did search and found the knowledgebase article describing how to change them, but is the gain really worth the trouble (and more importantly, the risk)?
PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices
On 2013-04-22 8:56 AM, Andre Lucas Falco wrote: 2013/4/21 Tanstaafl wrote: Windows VMs see get an 'LSI Logic SAS', and my gentoo VM gets an 'LSI Logic Parallel' controller. Did you tested using pvscsi? It's improve performance with less cost to CPU usage. No, I didn't... It appears there is pvscsi support in the mainline linux kernel, but is it rock-solid? Anyone else here running gentoo linux with this driver for their primary/boot disk controller? Also, for my windows server 2008r2 vms, I used the default, which was the LSI SAS... I did search and found the knowledgebase article describing how to change them, but is the gain really worth the trouble (and more importantly, the risk)?
