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https://issues.apache.org/jira/browse/HADOOP-4680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12648894#action_12648894
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Pete Wyckoff commented on HADOOP-4680:
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This is the fix but I still haven't looked at why the unit test didn't catch it.
{code}
- st->f_bavail = cap/bsize;
+ st->f_bavail = (cap-used)/bsize;
{code}
I used this to debug:
{code}
#include <sys/statvfs.h>
#include <stdio.h>
int main(int ac, char ** av) {
struct statvfs b;
statvfs(av[1], &b);
printf("%ld\n",b.f_bsize);
printf("%ld\n",b.f_frsize);
printf("%ld\n",b.f_blocks);
printf("%ld\n",b.f_bfree);
printf("%ld\n",b.f_bavail);
printf("%ld\n",b.f_files);
printf("%ld\n",b.f_ffree);
printf("%ld\n",b.f_favail);
printf("%ld\n",b.f_fsid);
printf("%ld\n",b.f_flag);
printf("%ld\n",b.f_namemax);
}
{code}
> fuse-dfs - df -kh on hdfs mount shows much less %used than the dfs UI
> ---------------------------------------------------------------------
>
> Key: HADOOP-4680
> URL: https://issues.apache.org/jira/browse/HADOOP-4680
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/fuse-dfs
> Reporter: Pete Wyckoff
>
> i.e., statfs broken.
> This used to show the correct amount and now is showing wrong numbers in
> production environment.
> Yet, the unit test for this passes??
> This is the trunk version of fuse-dfs against 0.17 libhdfs and hadoop.
> Unknown if this affects 0.18.2 or 19.1 or trunk but i suspect it does.
> admittedly fuse-dfs isn't supported against hadoop 17 but I am confident that
> it is likely broken in all versions.
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