First cut at 8000- slides to match notes.
[libguestfs-talks.git] / 2019-kvm-forum / 8100-tradeoff-automatic-v-explicit.html
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5 <h1>Tradeoff: Automatic or explicit</h1>
6
7 <p>
8   Filler - need to demonstrate:
9   start with 1k image
10
11   <p>
12     Automatic (like file system):
13     <br>NBD_CMD_WRITE(offset=0,len=2k) -> success, size now 2k
14   <p>
15     Explicit (like block device):
16     <br>NBD_CMD_WRITE(offset=0,len=2k) -> fails
17     <br>NBD_CMD_RESIZE(2k) -> success, size now 2k
18     <br>NBD_CMD_WRITE(offset=0,len=2k) -> success
19 </p>