We are currently using memkeys version packaged in 2013 from https://github.com/tumblr/memkeys (from what I can see in control), but the repository of the author (https://github.com/bmatheny/memkeys) seems to have reached version 0.2 with commits up to 2018.
I still need to verify how many improvements it contains, but the version that we have is a bit "shaky":
elukey@mc1035:~$ memkeys --helpp Segmentation fault
| Project | Branch | Lines +/- | Subject | |
|---|---|---|---|---|
| operations/debs/memkeys | debian | +15 -4 | Release latest upstream |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Resolved | PRODUCTION ERROR | None | T203786 Mcrouter periodically reports soft TKOs for mc1029 (was mc1035, mc1022) leading to MW Memcached exceptions | ||
| Resolved | elukey | T208376 Upgrade memkeys to its latest upstream |
Change 470773 had a related patch set uploaded (by Elukey; owner: Elukey):
[operations/debs/memkeys@debian] Release latest upstream
Change 470773 merged by Elukey:
[operations/debs/memkeys@debian] Release latest upstream
Mentioned in SAL (#wikimedia-operations) [2018-10-31T09:24:31Z] <elukey> upgraded memkeys to 20181031-1 on all the mc* - T208376
Mentioned in SAL (#wikimedia-operations) [2019-05-20T06:20:10Z] <elukey> upgrade memkeys to version 20181031-1 on all the mc* hosts (was deployied only on a few of them) - T208376