Hello Daniel Becker, Zoltan Borok-Nagy, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/21869
to look at the new patch set (#2).
Change subject: IMPALA-11265: Part2: Store Iceberg file descriptors in encoded
format
......................................................................
IMPALA-11265: Part2: Store Iceberg file descriptors in encoded format
The file descriptors in HdfsPartition are cached as byte arrays to keep
the memory footprint low. They are transformed into actual
FileDescriptor objects once queried.
This patch changes IcebergContentFileStore to similarly use byte arrays
as an internal representation for file descriptors. Note, file
descriptors for Iceberg tables have 2 components: one is the same as in
HdfsPartition and the other stores Iceberg specific file metadata in an
addiitonal byte array.
Measurements and observations:
- I have a test table that has 110k data files. For this table the JVM
memory usage in the catalogd got reduced from 80MB to 65MB.
- Both HdfsPartition.FileDescriptor and IcebergContentFileStore use
flatbuffers and in turn byte arrays to represent file descriptors and
these byte arrays are shared between these 2 places. As a result
there is no redundancy in storing the file descriptors both for the
Iceberg and the Hdfs table.
- There is no measurable difference in planning times with this patch.
Change-Id: I9d7794df999bdaf118158eace26cea610f911c0a
---
M fe/src/main/java/org/apache/impala/analysis/OptimizeStmt.java
M fe/src/main/java/org/apache/impala/catalog/FeIcebergTable.java
M fe/src/main/java/org/apache/impala/catalog/HdfsPartition.java
M fe/src/main/java/org/apache/impala/catalog/IcebergContentFileStore.java
M fe/src/main/java/org/apache/impala/catalog/IcebergTable.java
M fe/src/main/java/org/apache/impala/catalog/iceberg/IcebergCtasTarget.java
6 files changed, 184 insertions(+), 111 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/69/21869/2
--
To view, visit http://gerrit.cloudera.org:8080/21869
To unsubscribe, visit http://gerrit.cloudera.org:8080/settings
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I9d7794df999bdaf118158eace26cea610f911c0a
Gerrit-Change-Number: 21869
Gerrit-PatchSet: 2
Gerrit-Owner: Gabor Kaszab <[email protected]>
Gerrit-Reviewer: Daniel Becker <[email protected]>
Gerrit-Reviewer: Gabor Kaszab <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
