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https://issues.apache.org/jira/browse/HBASE-8015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13596484#comment-13596484
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Francis Liu commented on HBASE-8015:
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{quote}
How do you plan to enforce this? WAL's completely bypass the quota, and if a
ns's quota fills up, it cannot flush, and compact, which will affect all of the
other namespaces. I am not against the idea of having a parent namespace dir
for tables, but just wondering whether this is really feasible.
{quote}
Maybe we should have WALs per namespace per server :-). If we want other
namespace based features (ie replication) going this route makes sense?
Internally we plan to do it using regionserver groups (one namespace per
group). Since we don't want our tenants contending for other resources as well
(disk, mem, cpu, etc).
{quote}
Can't we enforce quotas at the HBase level, since we are doing ACL's at the
application layer for the same reasons.
{quote}
It'd be good if we can leverage hdfs quota since it's already there and has
worked well (at least for us). That's also less complexity for us, then we can
focus on adding HBase specific Quota (ie regions, tables, etc).
> Support for Namespaces
> ----------------------
>
> Key: HBASE-8015
> URL: https://issues.apache.org/jira/browse/HBASE-8015
> Project: HBase
> Issue Type: New Feature
> Reporter: Francis Liu
> Assignee: Francis Liu
> Attachments: HBASE-8015_draft_94.patch, NamespaceDesign.pdf
>
>
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