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Re: CatDV Re-archive footage with Cache-A

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Jeff SchaapRe: CatDV Re-archive footage with Cache-A
by on May 1, 2012 at 1:34:44 pm

Hey All,

We did more testing this past week. Rolf, we do seem plagued by the time out problem you mentioned. Here's what we did:

1) We wrote 650 files, about a terabyte's worth, to LTO through CatDV without any issue.

2) We ejected the tape and deleted the vtape then reinserted it. We called for a restore of all 650 files. We got a time out error (after about 2 minutes). We tried to restore one file and that came back fine. Left for the weekend.

3) Monday, we call for a restore of the 650 files. After about a ten minute pause it took off with the restore without issue. However, it only restored 251 of the 650 files and CatDV said it was "unable to restore" the rest. They were also not on the vtape.

4) We call for another restore. It skips the ones it already has done and recalls the rest from tape without issue. So it works, sorta.

There seems to be some sort of issue with CatDV timing out when there is a large amount of files to be restored. Rolf, what exactly is happening at this stage that is causing the system to pause so long? Is it building and transmitting a list of files to restore to the Cache-A?

We are performing the multiple write to the same tape tests right now (without using CatDV) and we'll let you know what happens there.

Jeff


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