[squid-users] Setting Squid to work with a remote DB?

[His Shadow]

I meant without replication. Service on the server with mysql
generates data for external helpers and hashes it with sha1 for
example. External helpers check if the hash has changed from time to
time, download new data, parse it, use it for authentication. Who
knows what could go wrong, while replicating, especially if the
network is under load. That's what I've been doing for years, I had
the same problem as you, I first used external API for auth, which
resulted in time spikes, even with result caching.

вс, 29 авг. 2021 г. в 13:15, roee klinger <roeeklinger60 at gmail.com>:
>
> Yes, this is what I am doing now. I am creating a local install of MySQL
> and than I am replicating the table into the local install, but I would
> prefer to get around that.
>
> On Sun, Aug 29, 2021 at 4:01 AM His Shadow <shadowpilot34 at gmail.com> wrote:
>>
>> You could write a service that occasionally dumps user credentials
>> into some format, like json and have your external helpers download
>> it, parse it and use it as local cache. There will be delay, when
>> adding new users, but authentication would be very fast. Unless the
>> database is huge of course.
>>
>> сб, 28 авг. 2021 г. в 21:59, roee klinger <roeeklinger60 at gmail.com>:
>> >
>> > Hello,
>> >
>> > I have multiple Squid servers installed in different data centers across different cloud providers, and they all need to authenticate users using a single database (MySQL) on a separate server, which is also on a different cloud provider on a different data center.
>> >
>> > I have already written an external authentication script that reads from MySQL and everything is working fine, however, I have some performance concerns, since the DB is located externally and in a different region of the world from the Squid server.
>> >
>> > I made some speed tests to see how long it takes to query the DB as Squid would:
>> >
>> > if the database is located on the same machine as Squid: 1.067-millisecond average query
>> >
>> > if the database is located on the same datacenter as Squid: 2.67-millisecond average query
>> >
>> > if the database is located on a different datacenter than Squid (different country as well): 38.9-millisecond average query
>> >
>> >
>> > Now I am wondering, is 36-millisecond average added query time a big deal when dealing with HTTP/S traffic? how significant is this added time to Squid and will performance get hurt drastically?
>> >
>> > I know there is some caching going on the Squid side, but I had to set the caching to really low values (around 15s), as per the requirement I was given.
>> >
>> > If I will have no other choice, I will simply replicate the DB table from the DB server to the Squid server, but I prefer not to do that, as it will require installing MySQL on all the Squid servers (or some other DB, but then I have to do replication from different DBs).
>> >
>> > Thanks.
>> >
>> > _______________________________________________
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>> > squid-users at lists.squid-cache.org
>> > http://lists.squid-cache.org/listinfo/squid-users
>>
>>
>>
>> --
>> HisShadow



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HisShadow