Support Questions

Find answers, ask questions, and share your expertise
Announcements
Celebrating as our community reaches 100,000 members! Thank you!

Why hdfs block size is 128 MB? Why it is not 100 MB or other?

avatar
Rising Star

Hi,

Hope all doing well.

I'm looking for reason why data block size is 128 MB in Hadoop 2.x? What logic we have used to define the size should be 128 MB? Why we didn't define 100MB?

1 ACCEPTED SOLUTION

avatar
Expert Contributor
hide-solution

This problem has been solved!

Want to get a detailed solution you have to login/registered on the community

Register/Login
3 REPLIES 3

avatar
Cloudera Employee

Mainly it's because of performance reasons.

Have a read through this: https://community.hortonworks.com/questions/27567/write-performance-in-hdfs.html#answer-27633

avatar
Rising Star

Thanks for reply.

But still i'm in doubt, Why it is not 126 MB or 132 MB?

avatar
Expert Contributor
hide-solution

This problem has been solved!

Want to get a detailed solution you have to login/registered on the community

Register/Login