[linux-lvm] lvm limitations

[Tomas Dalebjörk]

I also consider to build this application as an open source project
but of course it would be good to have some sponsors

I have been working as a C developer for over 35 years, and have created kernel drivers for both commercial and open source operating system
and developed several commercial applications that have been used on many places by banks, military, education etc

do you know where to get sponsors from if any are likely to help?

regards Tomas

Sent from my iPhone

> On 16 Sep 2020, at 00:26, Gionatan Danti <g.danti at assyoma.it> wrote:
> 
> Il 2020-09-15 23:47 Zdenek Kabelac ha scritto:
>> You likely don't need such amount of 'snapshots' and you will need to
>> implement something to remove snapshot without need, so i.e. after a
>> day you will keep maybe 'every-4-hour' and after couple days maybe
>> only a day-level snapshot. After a month per-week and so one.
> 
> Agree. "Snapshot-thinning" is an essential part of snapshot management.
> 
>> Speaking of thin volumes - there can be at most 2^24 thin devices
>> (this is hard limit you've ask for ;)) - but you have only  ~16GiB of
>> metadata to store all of them - which gives you ~1KiB of data per such
>> volume -
>> quite frankly this is not too much  - unless as said - your volumes
>> are not changed at all - but then why you would be building all this...
>> That all said -  if you really need that intensive amount of snapshoting,
>> lvm2 is likely not for you - and you will need to build something on your own,
>> as you will need way more efficient and 'targeted' solution for your purpose.
> 
> Thinvols are not activated by default - this means it should be not a big problem managing some hundreds of them, as the OP ask. Or am I missing something?
> 
> Regards.
> 
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> Danti Gionatan
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