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the unique IDs and uses this information to short-circuit the request. If the request is for
a user that does not have a photo, a redirect to a default image can be sent. The redirect is
used instead of a full photo to keep the transaction light and to ensure that browsers get an
opportunity to cache the default image for faster rendering.
In BluePages, this cache avoids over one million service calls from reaching the processing
phase of the service. That translates into over one million database calls while improving
overall response times.
Dynamic LDAP Caching
Sometimes caching all the data in RAM is just a waste of space. LDAP caching with some
level of detail is probably not the best candidate to load into RAM. Presumably there is a
high level of caching at the LDAP server, so it is best not to add another layer. Therefore, a
cache is needed that builds based on usage, and some general rules about how memory can
be reclaimed and which entries are always a ???good idea??? to have.
The typical reporting view includes a list of individuals related to the current profile. While
one LDAP connection can be established with multiple queries executed, the transaction
itself is still somewhat intensive.
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