zenfs build and install

record.txt

# Today, zns occurs to me so I decide to install zenfs to see how it fits into rocksdb. Environment setting up can always be tedious and ugly. So list a summary here:

# rocksdb only
https://blog.csdn.net/u013171226/article/details/110167997
make static_lib
make install-static PREFIX=/usr/local/rocksdb

# rocksdb + zenfs
// then must add to bashrc(needed for both)
// (Or you may meet errors: undefined reference to `google::FlagRegisterer: rocksdb...
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/rocksdb/lib
export PKG_CONFIG_PATH=/usr/local/lib

https://github.com/westerndigitalcorporation/zenfs

// I met several problems related to linking shared libraries of glib. Found a good solution searching for a while. The basic idea is to add /usr/local/lib to conf......
https://hyunyoung2.github.io/2016-04-07-While_Loading_Shared_Libraries,_error_Cannot_Open_Shared_Object_File

// use null_blk as ex
modprobe null_blk nr_device=1 zoned=1
echo deadline > /sys/class/block/nullb0/queue/scheduler
./plugin/zenfs/util/zenfs mkfs --zbd=nullb0 --aux_path=plugin/zenfs/log

// hit an EIO again. Come back later :)
./db_bench --fs_uri=zenfs://dev:nullb0 --benchmarks=fillrandom --use_direct_io_for_flush_and_compaction
Failed creating env: Invalid argument: IO error: No such file or directory: While mkdir if missing: /plugin/zenfs/log/: No such file or directory: zenfs://dev:nullb0

// tip: when something goes wrong and then changes some configs, better to make clean after remake.