[ https://issues.apache.org/jira/browse/HDFS-6293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984360#comment-13984360 ]
Kihwal Lee commented on HDFS-6293: ---------------------------------- Another option may be adding an option for checkpointing (2NN, SBN and the checkpoint command) to write out an image in a format that is readily consumable. This image will be written out in addition to the real fsimage and only meant to be used by OIV. > Issues with OIV processing PB-based fsimages > -------------------------------------------- > > Key: HDFS-6293 > URL: https://issues.apache.org/jira/browse/HDFS-6293 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 2.4.0 > Reporter: Kihwal Lee > Priority: Blocker > Attachments: Heap Histogram.html > > > There are issues with OIV when processing fsimages in protobuf. > Due to the internal layout changes introduced by the protobuf-based fsimage, > OIV consumes excessive amount of memory. We have tested with a fsimage with > about 140M files/directories. The peak heap usage when processing this image > in pre-protobuf (i.e. pre-2.4.0) format was about 350MB. After converting > the image to the protobuf format on 2.4.0, OIV would OOM even with 80GB of > heap (max new size was 1GB). It should be possible to process any image with > the default heap size of 1.5GB. > Another issue is the complete change of format/content in OIV's XML output. > I also noticed that the secret manager section has no tokens while there were > unexpired tokens in the original image (pre-2.4.0). I did not check whether > they were also missing in the new pb fsimage. -- This message was sent by Atlassian JIRA (v6.2#6252)