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https://issues.apache.org/jira/browse/HDFS-7687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14493560#comment-14493560
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Takanobu Asanuma commented on HDFS-7687:
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I wrote a simple test code about fsck:
{code:java}
Path ecDirPath = new Path("/striped");
Path ecFilePath = new Path(ecDirPath, "ecfile");
int numBlocks = 4;
DFSTestUtil.createECFile(cluster, ecFilePath, ecDirPath, numBlocks,
NUM_STRIPE_PER_BLOCK);
runFsck(conf, 0, true, "/");
{code}
The results are here:
{noformat}
Status: HEALTHY
Total size: 12582912 B
Total dirs: 2
Total files: 1
Total symlinks: 0
Total blocks (validated): 4 (avg. block size 3145728 B)
Minimally replicated blocks: 4 (100.0 %)
Over-replicated blocks: 4 (100.0 %)
Under-replicated blocks: 0 (0.0 %)
Mis-replicated blocks: 4 (100.0 %)
Default replication factor: 3
Average block replication: 9.0
Corrupt blocks: 0
Missing replicas: 0 (NaN %)
Number of data-nodes: 9
Number of racks: 1
FSCK ended at Tue Apr 14 13:04:16 JST 2015 in 9 milliseconds
The filesystem under path '/' is HEALTHY
{noformat}
>From the results, BlockStripedInfo(which is ec block group) is regarded as
>Over-replicated blocks because current fsck is specialized in replication. I
>think we should separate between replication and EC. For example,
{noformat}
Status:
Total size:
Total dirs:
Total files:
Total symlinks:
Number of data-nodes:
Number of racks:
Replication:
Total blocks (validated):
Minimally replicated blocks:
Over-replicated blocks:
Under-replicated blocks:
Mis-replicated blocks:
Default replication factor:
Average block replication:
Corrupt blocks:
Missing replicas:
EC:
Total EC block groups (validated):
Over EC block groups:
Under EC block groups:
Mis EC block groups:
Default EC schema:
Corrupt EC block groups:
Missing EC block groups:
{noformat}
How does look that?
> Change fsck to support EC files
> -------------------------------
>
> Key: HDFS-7687
> URL: https://issues.apache.org/jira/browse/HDFS-7687
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Takanobu Asanuma
>
> We need to change fsck so that it can detect "under replicated" and corrupted
> EC files.
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