Read preference among secondary nodes?

Ops and Admin Replication
1

Hi

I have 3 nodes in replica set. Lets say A is primary and B, C are secondary.
I have configured write concern as “majority”
{ w : “majority” }

I have configured read preference as “Read from secondary”.
Now lets say at time
t1 - A , B and C are consitent
t2 - write happens
t3 - A, B are consistent and not C (due to write majority)

Question 1

t4- If we do read, from which secondary node (B or C) read is served ? what technique is used by default ? Is it from B as it has latest update ?
Is it from C ? If this happens i might get stale data. Not wanted to happen.

Question 2

And also could you please explain maxStalenessSeconds when does maxStaleness comes into picture if lag is compared against primary node last write and secondary node last write ?
To comapre we have two entities primary time and secondary time ? what is the role of maxStaleness

2

First please go over all your previous thread and make sure you help the forum be useful by marking as the solution one of the many replies you got.

You should find the answers in

3

then your only choice is to use lineariable read.