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Optimize possible split block search space

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Remove duplicate segment copies to minimize the possible search
space for reconstruction.  Once reduced an accurate assessment can
be made regarding the difficulty in reconstructing the block.

Also, ztest will now run zdb with
zfs_reconstruct_indirect_combinations_max set to 1000000 in an attempt
to avoid checksum errors.

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6900
This commit is contained in:
Brian Behlendorf
2018-03-29 14:50:40 -07:00
parent 9e052db462
commit 4589f3ae4c
3 changed files with 101 additions and 46 deletions
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cmd/ztest/ztest.c
+2 -1
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@@ -6221,7 +6221,8 @@ ztest_run_zdb(char *pool)
ztest_get_zdb_bin(bin, len);
(void) sprintf(zdb,
"%s -bcc%s%s -G -d -U %s %s",
"%s -bcc%s%s -G -d -U %s "
"-o zfs_reconstruct_indirect_combinations_max=1000000 %s",
bin,
ztest_opts.zo_verbose >= 3 ? "s" : "",
ztest_opts.zo_verbose >= 4 ? "v" : "",