hichaminho
Contributor
Contributor

Does changing the Vcops collect interval from 5 to 1 min has impact on the storage ?

Hi Buddies,

Does anyone knows if changing the Vcops collect interval from 5 to 1 min has impact on the storage.

by collecting each 5 min, I can access store 1 year informations.

Passing from 5 min to 1 min mean collecting five times more. do I still can store 1 year informations. How it works ?

Please HELP.

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8 Replies
gradinka
VMware Employee
VMware Employee

this is not really a recommended change.

it's not only about storage, but cpu/mem load on the system AND on the service being pooled (e.g. vCenter for example)

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mark_j
Virtuoso
Virtuoso

Yes, yes it will have an impact on storage. Your storage requirements space-wise would be 5x that of 5min collection intervals (default and what the calculator will assume). In terms of Disk I/O, CPU, and Mem, you'd take a hit as well. From a dynamic threshold perspective, you'll be significantly increasing the quantity of buckets DTs will need to analyze so expect some resource constraints when they kick off. From a DT perspective, you'd want to consider dropped the DT window down from 6 months to something more manageable to keep equal sizing reqs.. maybe 1-2 months. Other tasks might also have issues.. gradinka cited that as well. 1-min granularity is not something we do often, nor do we recommend it, given the 5x more volume you're trying to grab from the data sources and then cram in to the vROps components. Remember - vROps retains data at the interval it is collected and roll-up doesn't happen.. that granularity will exist and consume resources until the data ages out based on retention criteria.

If you find this or any other answer useful please mark the answer as correct or helpful.
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MattG
Expert
Expert

I am interested in 1 minutes intervals for disk latency.   5 minute intervals smooth out the peak latencies too much.

-MattG

-MattG If you find this information useful, please award points for "correct" or "helpful".
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virtualirfan
Contributor
Contributor

Hey MattG,

Can you share your use case a little more? Is this a troubleshooting or reporting use case?

fwiw, agree with the need to go down to finer granularity for the purposes of seeing the peaks. Email me to discuss further.

Irfan

irfan@cloudphysics.com

CTO | Co-founder CloudPhysics, Inc. http://www.cloudphysics.com http://virtualirfan.com
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MattG
Expert
Expert

virtualirfan,

Troubleshooting.   I have hosts that are peaking 200ms+ every 15 minutes.  However,  since vROPs rolls up the metrics every 5 minutes,  the peaks are totally smoothed away in vROPs.   It makes it difficult to correlate disk latency to other perf issues.

-MattG

-MattG If you find this information useful, please award points for "correct" or "helpful".
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virtualirfan
Contributor
Contributor

Agreed. Feel your pain. If you have a minute, reach out to discuss further.

CTO | Co-founder CloudPhysics, Inc. http://www.cloudphysics.com http://virtualirfan.com
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hichaminho
Contributor
Contributor

hey Irfan,

I am still working on the 5 min to 1 min disk latency to avoid smooting my picks.

did you please get a solution ?

what do you think about the situation ?

Thank you for helping me,

Hicham

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ysandfort
Expert
Expert

Although not recommended, if you change the interval from 5m to 1m you will have roughly 5 times the data volume. Retention is a different setting, you could still allow for 1 year of data storage?

Yves

comdivision consulting GmbH (www.comdivision.com) is a germany based Solution Provider. We provide specialised knowledge and solutions around licensing, troubleshooting and performance tuning. Our team of award winning trainer's and consultant's which are happy to help you educate your users and customers. comdivision consulting is proud VMware partner of the Management & Zimbra Lighthouse program
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