Questions about Varnish file storage engine

Question

I have Varnish cache in front of some websites with the following storage engine configuration:

Storage: file
Size: 130GB

The server where it is installed has the following configuration:

RAM: 7.5 GB
SSD 1: 15GB (System)
SSD 2: 150GB (130GB for Varnish storage)
CPU: 4

Summary, it is a c4.xlarge on AWS.

Currently, Varnish is currently using 123GB of the allocated storage (130GB).

So, what will happen when Varnish use all the 130GB of allocated storage?

Is Varnish going to delete the storage.bin file and create a new one?
Is it gonna stop working?
Or what is going to happen?

Thank you for your help.

Varnish is a cache. It'll do what caches do. Expire stuff. – womble Sep 14 '17 at 02:58 — womble, Sep 14 '17 at 02:58

score 1 · Answer 1 · answered Sep 14 '17 at 06:45

1

When the storage space is exhausted, Varnish won't create a new storage file or stop working. I will simply start evicting (i.e. 'nuking' using the Varnish terminology) objects cached in the storage when space for newer objects is required. You can check when that's happening looking at the MAIN.n_lru_nuked counter in varnishstat.

answered Sep 14 '17 at 06:45

Carlos Abalde

171
3

Thank you, you are right. I am currently checking varnishstat. – Joseph Paz Aliaga Sep 14 '17 at 19:33

Questions about Varnish file storage engine

1 Answers1