<div dir="ltr">Hi,<div><br></div><div>I am trying to evaluate osd-zfs based MDS and OST deployment on a 2 node setup.</div><div><br></div><div>I have the following questions about Lustre log:</div><div><ol><li><b>Is changelog and llog both the same, in the sense are they synonymous with each other?</b></li><li>I understand that ZIL is currently not supported in Lustre version 2.12.2. My question is : </li><ol><li>My understanding is that transactions (in general) need some logging mechanism for it to work in 'all or none' scenarios. Please correct me if my understanding is incorrect. I understand that changelog has to be enabled so that filesystem changes are recorded to be replayed after a crash.
<b>How does Lustre transactions work if there is no intent log/changelog ?</b></li><li>Does it mean that if changelog is NOT enabled and there is a crash, we risk losing all changes/updates to the filesystem ?</li></ol></ol><div>Appreciate your timely response and Thank you for your help.</div></div><div><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Regards<br><br>Sudheendra Sampath</div></div></div>