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DJ117
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Number of restore streams

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Hi,

The number of simultaneous streams available for backups (save streams) is managed by the  server parallelism setting, does this also apply to the number of streams used for restores?

The 9.x performance and optimisation guide states that you can configure server parallelism up to 1024. So if you are doing 100% restores  could you in theory be restoring 1024 saveset's simultaneously?

I understand server and client parallelism (at least I think I do), however I've never thought of it from a restore perspective.

Thanks in advance.

T

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4 Replies
bingo
4 Germanium

Re: Number of restore streams

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yes - there is no restriction for what direction streams must be used.

DJ117
1 Nickel

Re: Number of restore streams

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Hi Bingo,

Thanks for your reply.

That's what I had assumed but its good to get confirmation from someone else.

Another  question, what restore speeds would you typically see in your environment? The speeds we see seem to vary a lot, one job could be 200G/hr and another could be a low as 40 or 50G/hr, just wondering what might be considered the norm out there.

Thanks again for your time.

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crazyrov
4 Tellurium

Re: Number of restore streams

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Indeed, the server parallelism decides the total number of streams handled  by the said NetWorker at the same time. it include backup, restore and clones.

DJ117
1 Nickel

Re: Number of restore streams

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Hi CrazyRov,

Thanks for taking the time to reply, much appreciated.

Can you tell me what sort of restore speeds you would get in your environment? We are getting anywhere from about 20G/hr to about 200G/hr using DDBoost and client direct for the majority of clients.Just wondering if this is about expected or should we be doing better.

Thanks again for your reply.

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