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Windows Server 2008 R2 File Services Consolidation - Technology Update - page 7 / 63

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2.1a. SMB2 and SMB 2.1 improvements

Increased file sharing scalability

Improved performance

Request compounding reduces “chattiness”

Asynchronous operations allow filling high latency pipelines

Larger reads/writes can fill the pipe even with significant link latency

More secure and robust

Small command set  allows quicker innovation

Stronger and more efficient signing (HMAC SHA-256 replaces MD5)

Network fault tolerance with SMB2 durability

SMB 2.1 improvements

Large MTU support

Leasing improvements

Limits

SMB1

SMB2

Number of users

Max 2^16

Max 2^64

Number of open files

Max 2^16

Max 2^64

Number of shares

Max 2^16

Max 2^32

Total

SMB1

SMB2

Opcodes

>100

19

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