persistent memory blog

[dormando]

https://memcached.org/blog/persistent-memory/

did some extensive testing with the new persistent memory modules from
intel. If you can get them, they're pretty good. A lot less work to use
than I was expecting.

[Pradeep Fernando]

Hi Dormando,

Thanks for the post!. I want to run the same benchmark/configuration for one of my workloads.

In the post, you mentioned,

"Persistent memory is enabled using a DAX filesystem and a prototype patch for memcached’s restartable mode. The persistent memory is accessed via a mmap’ed file."

I have a pmem DAX file system and your mmap memory allocation patch would help me. Can you please share it -- I could not find a link in your post.

Further, I do not understand the additional requirement of 'memcached restartable mode' and how it relates to persistent memory.

Thanks in advance,

--Pradeep

[dormando]

Yo,

it's just this branch:

https://github.com/memcached/memcached/pull/342

pass "-e /path/to/dax/mount/memcache" and it'll use the persistent memory
mount. The graceful restart code isn't complete yet, but you can ignore it
if all you want to do is test using persistent memory for capacity
reasons.

Should be in the mainline soon. I'm pushing to get it complete.

-Dormando

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[Pradeep Fernando]

Thanks!. Will test it out.

--Pradeep

To view this discussion on the web visit https://groups.google.com/d/msgid/memcached/alpine.DEB.2.21.1909031615000.28461%40dskull.

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Pradeep Fernando.