virtual machine - Qemu using too much disk -

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i using centos 7 on host, , qemu emulation windows server, create 15 gb disk, after week or so, disk goes 30 gb, there way stop this? using snapshots. there windows service may creating lots of files, or maybe hd being used ram imprive system? 15 gb 30 lot, , server's hd not bigger, it's big issue me. reinstalled , turned lot of things off, same thing happens again. little here.

you don't mention kind of disk image you're using, , configuration is. i'm guessing description qcow2 image, since mention use of snapshots. snapshots stored inside qcow2 image increase size beyond visible guest os. eg if create qcow2 image has virtual disk size of 15 gb, possible consume more 15 gb on host if have saved multiple different snapshots in image , guest has been writing alot of data between each snapshot. when snapshots deleted, space consumed qcow2 won't released os normally. while seeing 30 gb of usage sounds quite large not totally unreasonable if using snapshots alot.


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