Specifically don't use ssds with multilevel cache. The cache wears out faster.
The Samsung evo is one of these, it has a small amount of fast ssd cache which it writes to temporarily before moving it to slower ssd storage. This results in the cache part getting way more writes than you'd expect.
Adam.
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On 4 Dec 2017, 14:12, at 14:12, Markus Klock markus@best-practice.se wrote:
I agree, also when choosing SSD make sure to pick a enterprise SSD as the RRD-writes easily can wear out a consumer-grade SSD with that much polling going on.
/Markus
2017-12-04 15:09 GMT+01:00 Moerman, Maarten mmoerman@ebay.com:
Hi, I monitor currently 800+ devices on a single box, and doing it on
16
cores @ 3.5ghz,64GB ram and the RRD directory mounted on a raid SSD
disk
With this setup, I can probably even get away with 1min polling.
Main points:
Lots of cores, I would suggest double what I have to startwith, lots’ of cores AND high speed of the cores is important
SSD for RRD storage (straight mount, no symlink)(currently
around 120gb in use)
DO spend the time on tuning snmp parameters (figuring outwhich devices are slow, and needs max-rep optimizations)
No-atime mounting of the file systemPlay-around with thread settings of the poller.If you have the hardware to spread it out over multiple boxes, go for
it,
you’ll get better performance for sure.
Maarten
*From: *observium observium-bounces@observium.org on behalf of Juan Camilo juan.villamil@sti.com.co *Reply-To: *Observium observium@observium.org *Date: *Monday, December 4, 2017 at 2:59 PM *To: *"observium@observium.org" observium@observium.org *Subject: *[Observium] Observium Hardware requirements
Hi Friends,
My company has a PRO Subscription and we plan to implement Observium horizontally:
Dedicated MySQL DBDedicated RRD and web interfaceMain PollerMaybe Poller #2We need your advice about hardware requirements to poll ~2500 devices
and
~100.000 ports.
Thanks,
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*Juan Camilo Villamil B.*
*Ingeniero Innovación Y *
*Desarrollo Tic *
*juan.villamil@sti.com.co juan.villamil@sti.com.co*
*(+57 1) 7429797 Ext: 60181 <+57%201%207429797>*
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