mirror- stream different drive size

Michael Neumann mneumann at ntecs.de
Fri Oct 20 16:24:15 PDT 2017



On 10/20/17 14:43, Predrag Punosevac wrote:
> Michael Neumann <mneumann at ntecs.de> wrote:
> 
>>     No. HAMMER1 mirroring works on the logical level, the physical drive
>>     size is not important. You can think of it as if you would replay the
>>     SQL statements in a database vs block level replication. With HAMMER1
>>     mirroring you end up with two physically distinct filesystems with
>>     identical content (where it matters).
>>     mirror-stream is damn cool. I once did a live presentation of it at my
>>     university, where I were replicating a PFS of my box from the data
>>     center via WiFi to this tiny little Asus EEEpc. Students could upload
>>     to my remote box and the name would pop up on my laptop via OSD once
>>     the file was replicated to my laptop. It became funny as people started
>>     to chat with me via OSD during my presentation by constructing file
>>     names and uploading them ;).
>>     Regards,
>>     Michael
> 
> One would think that a person with as many years of schooling as I have
> knows at least how to use Internet search engine. These slides from your
> HAMMER talk
> 
> https://www.ntecs.de/talks/HAMMER.pdf
> 
> are pure gem. Thank you so much for your e-mail and clarifications

You found it! :). You are welcome!

To clarify slide 4: You can either start "hammer mirror-stream" from the 
masterhost OR from the slavehost. You don't need both.


Regards,

   Michael



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