Mysql incremental backup

hi Experts,
Can someone help me to take mysql incremental backup using mysqldump? All my databases are on AWS RDS, so bin logging is not possible.
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Prabhin MPEngineer-TechOPSAsked:
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theGhost_k8Database ConsultantCommented:
Why don't you use automated backups for RDS?
Read: Backing Up and Restoring Amazon RDS DB Instances

Now, if you really want to do what you're asking then you can create an external replica of your RDS instance and then have binlogs there. Otherwise, I do not think it is possible.
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Prabhin MPEngineer-TechOPSAuthor Commented:
hi,
Automated backup cannot be used under production hours, so that why we are planning to do incremental backup so it make less  load  on server.
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arnoldCommented:
The binary log is the transactional, incremental backup for a restore in time.
Mysqldump only has a full backup,
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Prabhin MPEngineer-TechOPSAuthor Commented:
hi arnold,
Is there any option to perform incremental backup..?
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arnoldCommented:
Not that I am aware, your backup is remote?
https://dev.mysql.com/doc/refman/5.7/en/mysqldump.html
Provides the options depending on what the issue, consideration is.

Mysqldump -h aws_hosted_server .....
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theGhost_k8Database ConsultantCommented:
Prabhin, You should enable multi-AZ and the snapshots are then taken from the passive server, which will not be troubling your production.
What you're looking at is a wrong direction. Try to look for how to efficiently backup on RDS and you will have your issues sorted.
Thanks,
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Prabhin MPEngineer-TechOPSAuthor Commented:
Hi experts,
Most probably i think i have to go for read replication of RDS and from there i have to take backup.
If you guys have any other alternative way then let me know.
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arnoldCommented:
K V provided an amazon writeup that might be what you are looking for. the backup can be performed without impacting your production system,
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theGhost_k8Database ConsultantCommented:
Prabhin,

Read Replica - "read replication of RDS " is not aimed at what you're suggesting. Best way is using a Multi-AZ.

Thanks.
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Prabhin MPEngineer-TechOPSAuthor Commented:
I didn't get any proper answer. Created read replica and backup has configured on replica instance. Solution by myself..
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theGhost_k8Database ConsultantCommented:
Hello Author,

Consider following points:

1. As per the question:
"Can someone help me to take mysql incremental backup using mysqldump?"
- It is not possible to take incremental backups using mysqldump.
- There is only one exception and that is we have a commmon date column in all your tables and we don't update it ever..only then we can do:
mysqldump --where "date_col>'last-backup-date'"

2. About my suggestion:
- I suggested to go the way Amazon does it. It does take backup snapshots and it does provide the point in time restore options.
http://bfy.tw/HCn2
- I proposed using multi-az setup and that will take the backups from passive server without affecting production performance. Which is what I was pointing when I said "What you're looking at is a wrong direction. Try to look for how to efficiently backup on RDS and you will have your issues sorted."
http://bfy.tw/HCmx

- Another expert (Arnold) did agree with the suggestion.
- I did disagree with the sort of usage you're intending with read-replica --> "Read Replica - "read replication of RDS " is not aimed at what you're suggesting."

3. Also second part of your question:
"All my databases are on AWS RDS, so bin logging is not possible. "
- We can always create external slave and enable binlogging there if it is so much must.
- I still did not suggest that point as the requirement was incremental backup and it is already supported by AWS RDS itself.


There could be possible requirements which author has not specified here which may require special mention here for experts to answer. For eg. cost factor, limitation of usage/using existing setup provide with solution, requirement of backup/dump at a physical/ec2 location etc.

So, the solution provided here was indeed answer to the question, and I'd rather challenge if it is the best solution with provided inputs.
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