Hi, i'm running some standalone gnbd servers (option -c) and i'm wondering where the (read-)caching of the gnbd happens and when/how the cache will be emptied. As far as i understand it, the caching happens on the gnbd client. Is this correct? If so, when will the cache of the gnbd client be emptied? Will it be emptied if no one accesses the device? Or will it be cached until the device is reimported (removed and imported)? Are there other possibilities to clear the read cache? Are there possibilities to see how much data is cached (allocated memory of gnbd_recvd)? Or have i to look for linux page cache? I'm using gnbd as network block devices for virtual hosts on other servers. These virtual hosts can be moved between several hardware, but i want to be sure no old (cached) data will be read by the virtual servers. -- greetings eMHa
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