Yingchun Lai created KUDU-2977:
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Summary: Sharding block map of LogBlockManager
Key: KUDU-2977
URL: https://issues.apache.org/jira/browse/KUDU-2977
Project: Kudu
Issue Type: Improvement
Components: fs
Reporter: Yingchun Lai
Assignee: Yingchun Lai
I found LBM may manage a very large block map when tserver hold large scale
data, metric like:
{code:java}
{
"name": "log_block_manager_blocks_under_management",
"value": 7014790
}
{code}
LogBlock get/add should hold map's lock first, this is costly and will slow
down statup time.
[~tlipcon] also mentioned in https://issues.apache.org/jira/browse/KUDU-2014.
We can improve it by sharding this big map.
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