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Posted to dev@bookkeeper.apache.org by "Flavio Junqueira (Created) (JIRA)" <ji...@apache.org> on 2012/03/31 16:44:25 UTC
[jira] [Created] (BOOKKEEPER-201) Interface to remove slow disks
Interface to remove slow disks
------------------------------
Key: BOOKKEEPER-201
URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
Project: Bookkeeper
Issue Type: Improvement
Reporter: Flavio Junqueira
As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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[jira] [Commented] (BOOKKEEPER-201) Interface to remove slow disks
Posted by "Uma Maheswara Rao G (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/BOOKKEEPER-201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267356#comment-13267356 ]
Uma Maheswara Rao G commented on BOOKKEEPER-201:
------------------------------------------------
What if Bookie restarts? It may consider back again right. operator can not remove that disk from config as there might be some data written already. Am I missing?
> Interface to remove slow disks
> ------------------------------
>
> Key: BOOKKEEPER-201
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Flavio Junqueira
>
> As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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[jira] [Commented] (BOOKKEEPER-201) Interface to remove slow disks
Posted by "Uma Maheswara Rao G (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/BOOKKEEPER-201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267426#comment-13267426 ]
Uma Maheswara Rao G commented on BOOKKEEPER-201:
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Thanks a lot, Flavio for the explanation.
I got your point here. Operator should ensure that, he will repair the failed directories or replace with new before node down and start again back. So, that it will be consider it back as normal.
{quote}
We probably also want to give the operator the chance to add disks, just so that we can bring the bookie back to its original state in the case we replace the disk.
{quote}
Seems like a dynamic addition of directories. Good one.
> Interface to remove slow disks
> ------------------------------
>
> Key: BOOKKEEPER-201
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Flavio Junqueira
>
> As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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[jira] [Updated] (BOOKKEEPER-201) Interface to remove slow disks
Posted by "Ivan Kelly (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/BOOKKEEPER-201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ivan Kelly updated BOOKKEEPER-201:
----------------------------------
Fix Version/s: (was: 4.2.0)
4.3.0
> Interface to remove slow disks
> ------------------------------
>
> Key: BOOKKEEPER-201
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Flavio Junqueira
> Fix For: 4.3.0
>
>
> As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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[jira] [Commented] (BOOKKEEPER-201) Interface to remove slow disks
Posted by "Flavio Junqueira (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/BOOKKEEPER-201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13267416#comment-13267416 ]
Flavio Junqueira commented on BOOKKEEPER-201:
---------------------------------------------
bq. What if Bookie restarts? It may consider back again right.
The idea in this jira targets a single disk. The general idea is that a bookie might be mostly fine, except for a disk that is underperforming. Perhaps instead of giving the operator only the option of removing the bookie completely, we could give this option that enables the bookie to eventually stop writing to that disk. We probably also want to give the operator the chance to add disks, just so that we can bring the bookie back to its original state in the case we replace the disk.
bq. operator can not remove that disk from config as there might be some data written already.
One idea is to use the bookie recovery tool to reconstruct the ledger fragments on the faulty disk in another bookie.
> Interface to remove slow disks
> ------------------------------
>
> Key: BOOKKEEPER-201
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Flavio Junqueira
>
> As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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[jira] [Updated] (BOOKKEEPER-201) Interface to remove slow disks
Posted by "Ivan Kelly (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/BOOKKEEPER-201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ivan Kelly updated BOOKKEEPER-201:
----------------------------------
Fix Version/s: 4.2.0
> Interface to remove slow disks
> ------------------------------
>
> Key: BOOKKEEPER-201
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-201
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Flavio Junqueira
> Fix For: 4.2.0
>
>
> As per a conversation with Ivan and Ben, we propose an interface that enables an operator to make a bookie disk inactive. The general idea is that if a bookie has multiple ledger disks and one is continuously underperforming, then we would like to tell the bookie to stop creating ledgers on that disk. Eventually the bookie stops using that disk.
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