Re: [Libguestfs] [PATCH v2v] v2v: -it vddk: Don't use nbdkit readahead filter with VDDK (RHBZ#1832805).

This filter deliberately tries to coalesce reads into larger requests. Unfortunately VMware has low limits on the size of requests it can serve to a VDDK client and the larger requests would break with errors like this: nbdkit: vddk[3]: error: [NFC ERROR] NfcFssrvrProcessErrorMsg: received NFC error 5 from server: Failed to allocate the requested 33554456 bytes We already increase the maximum request size by changing the configuration on the VMware server, but it's not sufficient for VDDK with the readahead filter. As readahead is only an optimization, the simplest solution is to disable this filter when we're using nbdkit-vddk-plugin. Thanks: Ming Xie ---