Closed lmc395319437 closed 2 years ago
That is odd. Are you using memory backed null_blk?
cat /sys/kernel/config/nullb/features
Shoud contain memory_backed.
yes!I use null_blk.
$cat /sys/kernel/config/nullb/features memory_backed,discard,bandwidth,cache,badblocks,zoned,zone_size
Seems to have memory backed!
Hi,
What if you cat the memory_backed file in the same directory? It should be reporting 1 if it is memory backed.
On Thu, 26 May 2022, 09:57 lmc395319437, @.***> wrote:
yes!I use null_blk.
$cat /sys/kernel/config/nullb/features memory_backed,discard,bandwidth,cache,badblocks,zoned,zone_size
Seems to have memory backed!
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Thanks!
I'm going to set memory backed to 1 and it's going to run!
Why is "No valid superblock found" displayed after mkfs succeeds ?
$./plugin/zenfs/util/zenfs mkfs --zbd=nullb0 --aux_path=zenfs_log ZenFS file system created. Free space: 255552 MB
$ ./db_bench --fs_uri=zenfs://dev:nullb0 --benchmarks=fillrandom --use_direct_io_for_flush_and_compaction Failed creating env: Invalid argument: NotFound: No valid superblock found: zenfs://dev:nullb0
$ ./plugin/zenfs/util/zenfs list --zbd=nullb0 --path=./.rocksdb Failed to mount filesystem, error: NotFound: No valid superblock found
Linux version: 5.4.0-104-generic Description: Ubuntu 20.04.4 LTS RocksDB version: 7.3