I use my raspberry (raspian) as a backup machine. For syncing files to the sd card I use offlineimap, vdirsyncer and others (-> a lot of files are written). The backup itself is done by rsnapshot. The backup target is a 64 gb usb flash drive.
Since I also backup maildir folders (managed by offlineimap) I notice that the mount.ntfs-process is getting slow and eats up a lot of memory. The usage is increasing over several days and sometimes it's falling down very fast. The current outpot of top shows this:
pi@raspberrypi:~ $ top top - 21:06:15 up 7 days, 23:06, 1 user, load average: 1.91, 1.50, 0.86 Tasks: 140 total, 1 running, 139 sleeping, 0 stopped, 0 zombie %Cpu(s): 7.8 us, 6.1 sy, 0.0 ni, 74.4 id, 11.7 wa, 0.0 hi, 0.1 si, 0.0 st KiB Mem: 996452 total, 968956 used, 27496 free, 419484 buffers KiB Swap: 102396 total, 79640 used, 22756 free. 44644 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1313 root 20 0 422904 419996 1408 D 50.9 42.1 992:38.16 mount.ntfs 1094 root 20 0 0 0 0 D 1.3 0.0 37:07.14 usb-storage
I chose NTFS because of two requirements:
- must be easy readable on windows (it's a backup flash drive)
- has to support hard links (used by rsnapshot)
My questions are
- Is the consume of memory normal or something to take care?
- is my setup (backup on usb flash drive via rsnapshot, ntfs) meaningful?
I use this mount command in /etc/fstab
UUID=7C8CB4418CB3F3AC /mnt/usbstick ntfs utf8,uid=pi,gid=pi,noatime 0
Thanks in advance