Why long piece of hadoop, if u, system to do extra work, Daniel, please help solve, best can from so-CodePudding

Why long piece of hadoop, if u, system to do extra work, Daniel, please help solve, best can from the source analysis,

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U, how old have to keep searching modules, of what use

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reference 4 floor coolbamboo2008 response:

u, how old have to keep searching modules, of what use the

Can't get a field record size?

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reference 5 floor qazxcv1122 reply:

Quote: refer to 4th floor coolbamboo2008 response:

U, how old have to keep searching modules, of what use the

Can't get a field record size?

I think it will have more problems than now so convenient, after all, don't always to think how each module now, such as the size you just need to know the empty or not

CodePudding user response:

refer to 6th floor coolbamboo2008 response:

Quote: refer to the fifth floor qazxcv1122 reply:

Quote: refer to 4th floor coolbamboo2008 response:

U, how old have to keep searching modules, of what use the

Can't get a field record size?

I think it will have more problems than now it's easy, after all, don't always to think how each module now, such as the size you just need to know the empty or not

I still can't find the limit from the code fixed-length block reason

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reference 5 floor qazxcv1122 reply:

Quote: refer to 4th floor coolbamboo2008 response:

U, how old have to keep searching modules, of what use the

Can't get a field record size?

Fixed-length Block most of the file system's design idea

If u block, you need an extra block size of each block add a index index BZindex

Is not what you said with a field as simple record

When we flow to read a file Block, BZindex scanning brings extra overhead and improves the system complexity

U Block can lead to the design of the file system's memory cache complexity increase

U Block can increase the utilization rate of storage are the benefits of
But the efficiency is very low ~

Space, in time, or time in space, the LZ balance myself

At least for the moment from the space in time is the mainstream in the field of big data