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#general
Title
# general
r

rp

10/12/2021, 7:16 AM
Keeping only one core for write has the following implications: - Single point of failure - Difficult to scale out As a result, we decided to make all instances such that you can do any operation with them in any order. We use row level locking in SQL dbs + db constraints (like unique or primary key) - which prevent race conditions. Row level locking is mostly applied to operations that require a read -> update, whereas operations that require creation of a new row (like sign up a user), we rely on db constraint (like keeping the email column unique).