Effect of disk caching on performance

[Fariborz Navidan <md...@gmail.com>]

Hello All,

How does disk caching affects the VM's performance? If yes, which type of
disk caching do you advise?

Thanks

Re: Effect of disk caching on performance

[Andrija Panic <an...@gmail.com>]

https://doc.opensuse.org/documentation/leap/virtualization/html/book.virt/cha.cachemodes.html

On Wed, 13 Mar 2019 at 15:48, Fariborz Navidan <md...@gmail.com>
wrote:

> What is difference between NONE and WRITE THROUGH?
>
> On Wed, Mar 13, 2019 at 7:10 PM Andrija Panic <an...@gmail.com>
> wrote:
>
> > Not sure how this directly has anything to do with CloudStack - it's
> > standalone Hypervisor thing :)
> >
>


-- 

Andrija Panić

Re: Effect of disk caching on performance

[Fariborz Navidan <md...@gmail.com>]

What is difference between NONE and WRITE THROUGH?

On Wed, Mar 13, 2019 at 7:10 PM Andrija Panic <an...@gmail.com>
wrote:

> Not sure how this directly has anything to do with CloudStack - it's
> standalone Hypervisor thing :)
>

Re: Effect of disk caching on performance

[Andrija Panic <an...@gmail.com>]

Not sure how this directly has anything to do with CloudStack - it's
standalone Hypervisor thing :)

Re: Effect of disk caching on performance

[Ivan Kudryavtsev <ku...@bw-sw.com>]

Hi, Fariborz.
Several days ago there was a discussion about it. "NONE" or "WRITETHROUGH"
must be used when possible. WRITEBACK may be used __ONLY__ if you don't
care about data loss, e.g. ephemeral VMS which destroyed upon the crash.

Add more RAM to VM, implement bcache or LVMcache, add more drives, use SSD,
NVMe and forget about the games with stuff above.

ср, 13 мар. 2019 г. в 11:19, Fariborz Navidan <md...@gmail.com>:

> Hello All,
>
> How does disk caching affects the VM's performance? If yes, which type of
> disk caching do you advise?
>
> Thanks
>


-- 
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Bitworks LLC
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