[External] remotefilelog: Large Manifest

[Son Luong Ngoc]

Hi Augie,

> On Mar 3, 2020, at 15:51, Augie Fackler <raf at durin42.com> wrote:
> I haven't looked into FB's treemanifest extension, but note there are better-supported tree-manifests in core (confusingly named the same thing, not our fault sorry). Since it sounds like you're exploring converting to hg anyway, I'd encourage making a large re
> pository into treemanifest format so narrow can work more effectively.
As a matter of fact I did.
The conversion using hg-git to treemanifest was slower than normal manifest (i think 1.5 times?)
Narrow worked, just like the test-narrow-clone setup I copied from.
But the speed is still not ideal as you still have to iterate through O(n) manifests and changesets on the serverside.

The idea of having these cached via memcached is very appealing to a big repo which is why I am leaning more toward remotefilelog + sparse over narrow currently.

I am waiting for the minor release version that fix narrow + remotefilelog compatibility so that I can try both together.

Cheers,
Son Luong.
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