iozone command: iozone -c -s 12g -r 4k -i6 -i7 -+n -w -f ./write_test.out

stg1 local ext4:

      KB  reclen   fwrite   fread
12582912       4   189072 8765324

stg2 local hdfs replica2 : (50-100% fuse, 20-50% datanode)

      KB  reclen   fwrite   fread
12582912       4    75143  112906

stg1 hdfs client replica2 : (write: 50-100% fuse, 20-50% datanode - max. 20% wa; read: 50% fuse, 5-10% datanode - max. 4% wa)

      KB  reclen   fwrite   fread
12582912       4    77281   99237

iozone command: iozone -c -s 32g -r 4k -i6 -i7 -+n -w -f ./write_test.out

stg1 hdfs client: (write: 50-100% fuse, 20-50% datanode - max. 20% wa; read: 50% fuse, 5-10% datanode - max. 4% wa)

      KB  reclen   fwrite   fread
33554432       4    70600   93569

stg1 local ext4:

      KB  reclen   fwrite   fread
33554432       4   162836  199328

stg2 local hdfs replica 2: (50-100% fuse, 20-50% datanode)

      KB  reclen   fwrite   fread
33554432       4    67116  120027

Namenode kiesés esetén azonnal IO error a klienseken.