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Hardware Acceleration for RAID5/6, Deduplication & Security for parallel workloads
Vikas Aggarwal Storage Developer Conference Bangalore 2017
Team Members
- Venkatesh Bolla
- Achyutha Krishna
- Anil Reddy
Hardware Acceleration for RAID5/6, Deduplication & Security for - - PowerPoint PPT Presentation
Hardware Acceleration for RAID5/6, Deduplication & Security for - - PowerPoint PPT Presentation
Hardware Acceleration for RAID5/6, Deduplication & Security for parallel workloads Vikas Aggarwal Storage Developer Conference Bangalore 2017 Team Members Venkatesh Bolla Achyutha Krishna Anil Reddy Responsibilities: Storage
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Outline
- RAID 5/6
- Deduplication
- Security
- Open Source Storage Applications
- OCTEON TX Acceleration blocks
- Accelerated Data Flow
- Observations
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Offloading CPU intensive
- perations
- RAID6
- XOR
- Galois Field Multiplication
- Deduplication
- Fingerprint Generation
- Fingerprint Lookup
- Security
- Encryption/Decryption of Data Blocks
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Open Source Storage Software Offload Case Studies
RAID DEDUPLICATION SECURITY MD RAID DM Dedup ecryptfs DM RAID OpenZFS DM Crypt btrFS btrFS OpenDedup
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Linux MD RAID
- Implements the following:
- RAID 0, 1, 5, 6
- MDRAID can offload following to hardware using
async_tx Linux offload infrastructure:
- memcpy
- XOR
- Galois Field Arithmetic
- Current Offload benefits the following RAID variants:
- RAID 5, 6
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Linux DM-dedup
- Implements the following:
- 4KB block fingerprint
- Fingerprint to PBN(Physical block number) lookup
- LBN to PBN(Physical block number) lookup
- DM Dedup(modified) can offload following to hardware:
- Fingerprint (Digest using MD5, SHA1, SHA2)
- Fingerprint and LBN lookup.
- Current Offload benefits the following:
- Lookups.
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Linux eCryptfs
- In-kernel standalone implementation.
- Security gets inherited into incremental backups.
- Cryptographic metadata is stored along with encrypted file.
- Supports Linux cryptographic ciphers.
- Utilizes Linux crypto framework
- eCryptfs can offload following to hardware
- AES CBC
- DES3 CBC
- AES XTS
- Offload benefits: Encryption, Decryption.
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RAID Architecture
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Linux MDRAID Offload
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Dmdedup Architecture
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DmDedup WRITE Offload
Data Chunk
Compute HASH
DISK
Hash->PBN
DDF Offload Block
LBN->PBN LBN->PBN Dup WR Uniq WR dmdedup code dmdedup code Yes No
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DmDedup READ Offload
Compute LBN DATA
LBN->PBN
DDF Offload Block
Miss Hit
DISK
END dmdedup code
Sector
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Storage Security Offload
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Accelerations Integrated
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Accelerations Integrated
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5 10 15 20 25 30 35 4 8 16 24
OCTEON TX-raid-offload(cpu savings)
- No. disks/raid6 grp
RAID offload relative CPU savings
OCTEON TX %cpu idle
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1 2 3 4 5 6 0GB 40GB 80GB 160GB 200GB
x86_64 OCTEON TX OCTEON TX-offload
Dmdedup offload Ingest rate
OCTEON TX
throughput
5xGain
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1 2 3 4 5 6 40GB 80GB 160GB 200GB
x86_64 OCTEON TX OCTEON TX-offload
Dmdedup fio WRITE offload latency
OCTEON TX
5xReduction
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Ecryptfs
10 20 30 40 50 60 70 80 90 100 1 4 8 16 32 48
OCTEON TX OCTEON TX-offload
- No. threads
OCTEON TX
%cpu used
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Dedup + RAID6, eCryptFS+RAID6
10 20 30 40 50 60 70 80 90 50GB, 4Tx5GB 50GB, 8Tx2GB 100GB, 16Tx2GB
OCTEON TX OCTEON TX-offload
OCTEON TX
%cpu idle
OCTEONTX
throughput Fio WRITE
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Status
- Status of Work – Preliminary performance results. More
in future summits.
- Upstream the drivers.
- Other Platforms:
- DPDK+SPDK
- ODP
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