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Re: How to use zram ?




I'm trying to wrap my head around what the performance implications (or advantages) of zram might be in the virtualized environments. Currently for me that means mostly VMware and a little Xen. There are at least two aspects, namely its potential use in the hypervisor and use in the VMs. Does anyone have any guidance on this issue?
Second question: Do we know how the AWS-branded linux AMIs make use of zram if at all?
Thanks.......Nick G

On Thu, Sep 28, 2017 at 9:54 AM, Pierre Couderc <pierre@xxxxxxxxxx> wrote:

On 09/28/2017 04:09 PM, Gene Heskett wrote:
On Thursday 28 September 2017 09:58:39 tomas@xxxxxxxxxx wrote:

On Thu, Sep 28, 2017 at 09:51:21AM -0400, Gene Heskett wrote:
On Thursday 28 September 2017 05:47:56 Pierre Couderc wrote:
I have found no howto for zram under debian,  nor even the word
"zram" in the archives of this list !

I have tried to use zramctl but it refuses with :
A better question from me might be, what is it?
It seems to be a way to swap out to "compressed RAM"[1] (sloppy, I
know, but you hopefully get the idea).

I do have the kernel module, but not the zramctl. One is not useful w/o
the other. But I learned something from this thread. Thanks.

zramctl is delivered in basic stretch (ot I did install it witohut knowing...) but see my other post for its use.