We are running ElasticSearch on several Azure D12v2 instances, on Centos7.
While indexing data, machines' IO seems to be quite poor, dancing between 3MB and 15MB per second, which is blatantly slow for SSD storage.
-- Taken from IOTOP -- Total DISK READ : 0.00 B/s | Total DISK WRITE : 3.01 M/s Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 2.68 M/s -- Taken from IOTOP -- Total DISK READ : 0.00 B/s | Total DISK WRITE : 6.93 M/s Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 8.54 M/s
Is anyone running this type of VM facing the same problem? If so, how can it be fixed? Am I missing something and these read/write speeds are "normal "?
Doing same tests on physical machines with mechanical drives had better result.
I changed the instances to DS12v2, yet similar performance is attained (With some random spikes between 30 to 50 MB/s)