Hi team, I had a disk space issue on a Cassandra server, and I noticed that the data was not evenly shared between my 15 disks. Here is the repartition : /dev/vde1 99G 89G 4.7G *96%* /volumes/cassandra/data/data1 /dev/vdd1 99G 51G 44G 54% /volumes/cassandra/data/data2 /dev/vdf1 99G 57G 38G 61% /volumes/cassandra/data/data3 /dev/vdg1 99G 51G 44G 54% /volumes/cassandra/data/data4 /dev/vdh1 99G 50G 44G 54% /volumes/cassandra/data/data5 /dev/vdi1 99G 50G 44G 53% /volumes/cassandra/data/data6 /dev/vdj1 99G 77G 17G 83% /volumes/cassandra/data/data7 /dev/vdk1 99G 49G 45G 53% /volumes/cassandra/data/data8 /dev/vdl1 99G 52G 42G 56% /volumes/cassandra/data/data9 /dev/vdm1 99G 50G 45G 53% /volumes/cassandra/data/data10 /dev/vdn1 99G 47G 47G *51%* /volumes/cassandra/data/data11 /dev/vdo1 99G 50G 44G 54% /volumes/cassandra/data/data12 /dev/vdp1 99G 52G 43G 55% /volumes/cassandra/data/data13 /dev/vdq1 99G 49G 45G 52% /volumes/cassandra/data/data14 /dev/vdr1 99G 50G 44G 53% /volumes/cassandra/data/data15
Do you know what could cause this, and how to even a little bit the data between the disks to avoid any disk saturation situation ? Because I noticed that when approaching 5% disk space on one disk, Cassandra performance drops. Thanks, Loïc CHANEL System Big Data engineer SoftAtHome (Lyon, France)
