Re: [Networker] Query in Staging from adv_file
2008-08-19 23:49:40
On 20/08/2008, at 1:27 PM, Curtis Preston wrote:
<snip>
I think the concurrent restore thing is a red herring. Sure, you
can't do two restores at once from a tape, but:
1. Most people don't do more than one restore a month, let alone
more than one a day, let ALONE two at the same time.
2. Add to that the odds that the two restores you do at the same
time would need the same tape at the same time. (Multiplexing would
increase the chances, but one should not multiplex to virtual tapes.)
3. If you want better odds, just use smaller virtual tapes. It
costs you nothing, adds no management issues (like more AFTDs do),
and significantly decreases the chance that two restores would be
grabbing for the same tape.
<snip>
This is certainly a good indication that we have user groups with
wildly varying requirements. While I have some users that fall into
the above category - rare restores, I've equally had plenty that
*frequently* recover - yes, the 400-600+ recoveries per day customer
that I mentioned previously was atypical (in fact, it was effectively
using NetWorker for HSM - and when I logged a support call about it
once the Legato tech thought I'd added an extra 0 onto the end of both
figures...), but I've had plenty where 10-20 recoveries per day is the
norm.
However, I certainly remain hopeful of seeing some changes to AFTD in
NetWorker Real Soon Now, as it's starting to get annoying that we
still can't:
- Run multiple stage operations
- Run multiple clone operations
- Failover a saveset from one DBU to another if it fills
- Better balance backups so that a small number of DBUs see a
disproportionate number of backups due to 'archaic' tape based volume
selection algorithms
Cheers,
Preston.
--
Preston de Guise
"Enterprise Systems Backup and Recovery: A Corporate Insurance
Policy", due out September 17 2008:
http://www.crcpress.com/shopping_cart/products/product_detail.asp?sku=AU6396&isbn=9781420076394&parent_id=&pc=
http://www.enterprisesystemsbackup.com
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- Re: [Networker] Query in Staging from adv_file, (continued)
- Re: [Networker] Query in Staging from adv_file, Francis Swasey
- Re: [Networker] Query in Staging from adv_file, Curtis Preston
- Re: [Networker] Query in Staging from adv_file,
Preston de Guise <=
- Re: [Networker] Query in Staging from adv_file, Francis Swasey
- Re: [Networker] Query in Staging from adv_file, Fazil Saiyed
- Re: [Networker] Query in Staging from adv_file, Bruce Breidall
- Re: [Networker] Query in Staging from adv_file, Davina Treiber
- Re: [Networker] Query in Staging from adv_file, Fazil Saiyed
- Re: [Networker] Query in Staging from adv_file, Curtis Preston
- Re: [Networker] Query in Staging from adv_file, Francis Swasey
[Networker] Query in Staging from adv_file, anandhg
[Networker] Query in Staging from adv_file, anandhg
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