<div dir="ltr">Hi.<br><br>I've Googled a bit and looked through the last few months of archives, but I didn't really find what I'm looking for ...<br><br>I have an existing Xen | LVM + DRBD 0.7 setup with external meta devices, and I want to migrate the guests to a new Xen server with DRBD <a href="http://8.2.6.">8.2.6.</a> In the process, I was thinking about changing the meta device to "flexible-meta-disk internal", but I need to add a small amount to the LV to accomdate the metadevice.<br>
<br>This lead me to the very nice formulas in the docs, and I am just too zonked to make heads or tails out of them. Am I doing the math right that you need (a lot) less than 1M of meta storage for 10GB of DRBD backing store?<br>
<br>Also, if I do the flexible method, how much space to you actually reserve on the device and hide from the OS/filesystem?<br><br>One concern that also came up is, if I grow the LV by X MBs, add the internal meta, what happens if I need to grow the device again? The new storage will be appended to the block device, and normally, I can do an xfs_growfs to "see" and allocate the new space ... what happens to the meta area?<br>
<br>I have just too many unknowns to be comfortable right now -- educate me, please!<br><br>Lastly, doing Xen live migration, does internal vs external meta have any pros or cons or is it not even a factor?<br><br>Thanks!<br>
Sam<br></div>