[
https://issues.apache.org/jira/browse/HBASE-17875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985602#comment-15985602
]
Sean Busbey commented on HBASE-17875:
-------------------------------------
{code}
+Why are the cells above 10MB not recommended for HBase?::
+ The large cells cannot fit the buffer well in HBase. Large cells bypass the
MemStoreLAB per write operation and cannot be cached in the L2 block cache per
read operation, HBase has to allocate the on-heap memory once a time. The GC
can be very bad.
+
{code}
Suggested rewrite:
"Large cells don't fit well into HBase's approach to buffering data. First, the
large cells bypass the MemStoreLAB when they are written. Then, they cannot be
cached in the L2 block cache during read operations. Instead, HBase has to
allocate on-heap memory for them each time. This can have a significant impact
on the garbage collector within the RegionServer process."
> Document why objects over 10MB are not well-suited for hbase
> ------------------------------------------------------------
>
> Key: HBASE-17875
> URL: https://issues.apache.org/jira/browse/HBASE-17875
> Project: HBase
> Issue Type: Bug
> Components: documentation, mob
> Reporter: stack
> Assignee: Jingcheng Du
> Fix For: 2.0.0
>
> Attachments: HBASE-17875.patch
>
>
> A new-user who has patently done their homework is unable to find in doc why
> objects above 10MB are not recommended for hbase. Lets add explanation that
> has a link from MOB on what happens when objects this size are requested form
> HBase.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
