sahara-extra/hadoop-swiftfs/src
Ray Zhang ef3c1ab4d5 Adds the lazy seek
Can make the query couple of 10 times faster.

In order to debug a Presto query performance issue, I observed the
seeking in Sahara-extra is expensive and sometimes even unnecessary.
The best way to avoid the overhead and unnecessary calls of seeking
is to do it only when the client really needs the data.
After this changes, the same query in Presto able to run 30 times faster.
Both Presto and S3 clients have added the similar changes too.

Change-Id: I8586af0d481fd08d48620e699467280f7b93150a
2016-10-05 13:26:54 -07:00
..
main/java/org/apache/hadoop/fs/swift Adds the lazy seek 2016-10-05 13:26:54 -07:00
site Fix misspellings in savanna-extra 2014-02-07 16:00:43 +08:00
test Hiding a pseudo-directory that contains DLO segments 2015-03-26 19:54:51 +09:00