[
https://issues.apache.org/jira/browse/HADOOP-17770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17385411#comment-17385411
]
Anoop Sam John commented on HADOOP-17770:
-----------------------------------------
Still many existing customers on WASB based storage. Create a new cluster
WITHOUT storage copy is an easy job. But when it comes to new cluster with
copy data (to ADL gen2 account) its not that easy. So this would be
benefitted. Anyways with other patch the basic infra was made in place. This
patch for WASB was much easy to do. :-)
> WASB : Support disabling buffered reads in positional reads
> -----------------------------------------------------------
>
> Key: HADOOP-17770
> URL: https://issues.apache.org/jira/browse/HADOOP-17770
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Attachments: AvgLatency_0 cache hit.png, AvgLatency_50% cache
> hit.png, Throughput_0 cache hit.png, Throughput_50% cache hit.png
>
> Time Spent: 4h 10m
> Remaining Estimate: 0h
>
> This is just like HADOOP-17038
> Right now it will do a seek to the position , read and then seek back to the
> old position. (As per the impl in the super class)
> In HBase kind of workloads we rely mostly on short preads. (like 64 KB size
> by default). So would be ideal to support a pure pos read API which will not
> even keep the data in a buffer but will only read the required data as what
> is asked for by the caller. (Not reading ahead more data as per the read size
> config)
> Allow an optional boolean config to be specified while opening file for read
> using which buffered pread can be disabled.
> FutureDataInputStreamBuilder openFile(Path path)
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: common-issues-h...@hadoop.apache.org
