Transaction log questoin
cashew
Member Posts: 122 ■■□□□□□□□□
I have a two part question.
1) When mail is first delivered to the exchange server it is first written to the transaction logs. When it's written to the transaction logs does the user receive it in their inbox, or do they receive it after it's written to the database?
2) When does the transaction logs write to the database? Every hour or so?
I know these are remedial questions, but I studied my butt off this weekend and might have absored too much info and forgot.
1) When mail is first delivered to the exchange server it is first written to the transaction logs. When it's written to the transaction logs does the user receive it in their inbox, or do they receive it after it's written to the database?
2) When does the transaction logs write to the database? Every hour or so?
I know these are remedial questions, but I studied my butt off this weekend and might have absored too much info and forgot.
Comments
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geekie
Member Posts: 391
When Exchange writes to the transaction logs, end users should see those changes even though they haven't been written to the DB yet. Exchange treats physically writing out changes to the DB as low-priority.Up Next : Not sure
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royal
Member Posts: 3,352 ■■■■□□□□□□
Microsoft docs say when "convenient." Basically, when Exchange isn't busy and has time to write it out to the database. Also, there are other times when data is written to database. For example, if you shut down a database, all outstanding log file data will be written to the database which puts the database into a consistent state.
Check out this doc which has lots of information on transaction logging:
http://technet.microsoft.com/en-us/library/d42ef860-170b-44fe-94c3-ec68e3b0e0ff.aspx“For success, attitude is equally as important as ability.” - Harry F. Banks