Thanks! If I understand it correctly, we need to at least open every HFile
once to load root indexes into the cache, right?
Another question - I went through Nick's BlockCache 101 and was intrigued
by BucketCache / CombinedBlockCache. If I used BucketCache in file mode
with SSDs, I see that I can
Hi all,
Is there a better way to warm HFile indexes other than scanning through my
datasets? I did see PREFETCH_BLOCKS_ON_OPEN, but the warning that it "is
not a good idea if the data to be preloaded will not fit into the
blockcache" makes me wary. Why would this be a bad idea?
Thanks!
I think the option you mentioned is for data blocks.
As for index blocks, please refer to HFile V2 design doc.
Also see this:
https://issues.apache.org/jira/browse/HBASE
-3857?focusedCommentId=13031489=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13031489
Cheers
On
