Reply to post: Re: Bandwidth != Latency

Besides the XPoint: Persistent memory tech is cool, but the price tag... OUCH

eldakka Silver badge

Re: Bandwidth != Latency

> If I get my 30 MB file off a HDD within 1 second, that's 30 MB/s

> If I wait for a tape drive to find the file for 9.9 seconds (latency) and then read it within 0.1 second, that's 30 MB/s.

> Bandwidth and latency are related.

Do the same calculation again when you have to restore a 3TB virtual server image.

Or have a raw movie file.

That 10-second seek latency of tape is irrelevant when you are talking 100's GBs and TB+ of sequential data - e.g. a server backup, large scientific data-sets, video, etc.

Some data access requirements are latency sensitive but bandwidth not-so-much (e.g. loading your word doc), others are more bandwidth sensitive and less so latency.

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