Questions regarding journal replay

[Eric Sandeen]

Ralf Hildebrandt wrote:
> * Eric Sandeen <sandeen at redhat.com>:
> 
>>> Journal block size:       4096
>>> Journal length:           8488436
>>> Journal first block:      2
>>> Journal sequence:         0x0027c611
>>> Journal start:            2
>>> Journal number of users:  1
>>> Journal users:            032613d3-6035-4872-bc0a-11db92feec5e
>> Ok we might be getting a little off-track here.  Your journal is indeed
>> 32G in size.  But you also saw this with an internal journal, which
>> should be limited to 128M, and yet you still saw a very long replay, right?
> 
> 800s for 128M, yes

So how well can you reproduce this... it would be interesting to run
this recovery under blktrace, to see where the IO is happening.

I'd be most interested in that for the "normal" 128M log, not the crazy
32G log :)

-Eric