On Sat, 26 Jan 2008, Bobby Williams wrote:
> We have warned, begged, pleaded, and threatened, but some application owners
> want to keep everything forever.
>
> I have a system with a file system with over 29 million files. Of course no
> one can afford advanced client. No one wants a raw partition backup because
> they may want that 1 file. You have heard the excuses.
>
> Well, the storm hit. I am moving a server to another data center and had to
> move the SAN volumes via tape.
>
> (Don't start telling me a better way of moving this stuff, that is not the
> point of this email and I have been suggesting ways for a while).
>
> I could not fire off a restore of the entire file system. It would just
> stay in the queue. I started seeing what I could fire off. I started
> selecting some subdirectories and was able to restore.
>
> There were only 21,300 individual subdirectories, so clicking a few in the
> GUI was NOT an option.
>
> I did a bplist and got the subdir names. Using split, I split the subdir
> names into groups of 50. Gave me 425 file lists.
>
> I ran a script to brute force the restores. Uh-oh. 1 tape with the data on
> it. Not enough memory to calculate the restore list for 425 restore jobs
> concurrently.
>
> There is a "-w" switch on the bprestore command. I now know what it is for.
> If you are scripting, it prevents the next restore from firing off until the
> previous restore is finished. I had to go with it to keep everything from
> timing out in the queue and not knowing what had run and what had not. I
> did include the "-L" to keep up with what had / had not fired.
>
> Data is going back and the restore will be successful. Howerver, someone
> promised that the system would be online for testing 10 hours after it was
> installed.
>
> I had told them several times this week that the full backup took 35 hours,
> so don't expect a quick restore.
>
> Point of the email is that "yes, we can back up millions of files without
> paying for advanced client, but we can't restore the data per your RTO/SLA".
>
>
>
>
> Bobby Williams
> 2205 Peterson Drive
> Chattanooga, Tennessee 37421
> 423-296-8200
>
>
This should be part of an FAQ, good to know!
There is a "-w" switch on the bprestore command. I now know what it is
for. If you are scripting, it prevents the next restore from firing off
until the previous restore is finished.
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