Thursday Nov 13, 2008

New Class Of Storage Systems - Sun Storage 7000 Unified Storage Systems

STK7410_Rack.pngI have been blogging for a while about Open Storage, ZFS Hybrid Storage Pools and Solid State Disks. Now the Products that combine all of those technologies are available and will disrupt the complete storage market!

You may ask why? Here are a few reasons:
  1. There is simple no price competitive system on the high end market
  2. Our system has no license fees - All inclusive incl. future features
  3. There is no other system that has in depth built-in analytics
  4. There is no other system that combines new technology SSD and traditional storage
  5. No other system has a rock solid OS like Solaris with all its features like DTRACE, Fault Management Architecture (FMA)
I could mention dozens of more reasons, but that should be already enough to seriously consider those systems in your business!

So, said enough marketing stuff, I would like to go a bit deeper and give you a short introduction of the products and its extraordinary features!

Sun Storage 7000 Unified Storage Systems

We have announced three different Unified Storage Systems for the beginning. The two smaller version are single node systems, while the 7410 can be used in a active/active cluster (2 Nodes). All systems are fully licensed and run the same OS. There are no features restrictions an the smaller systems, except the one given by the hardware configuration.

Sun Storage 7110 Unified Storage System

STK7110.pngThe 7110 is the entry level Unified Storage System. It has following hardware Specifications:
  • 14x Usable Disk Drives
  • Quad-Core Opteron
  • 8GB RAM
  • 4x 1 Gigabit Ethernet Ports
  • 6x PCI-E Slots per Node
Options:
  • 1Gb-E and 10 Gb-E Network Interface Cards
  • FC/SCSI HBA Options for Backup/Restore
Today the system is equipped with 14x 146GB 10k RPM Disks. In the future you will be able to have it also equipped with 14x 500GB SATA Disks.

The 7110 is the only system that cannot be equipped with SSDs for now. The system is perfectly suited as a workgroup storage and just uses 2u Rack Space.

Sun Storage 7210 Unified Storage System

STK7210.pngThe 7210 is the ultimate dense Unified Storage System. It doesn't only have a lot of disks but also quite some Caching and CPU power. Here are some hardware specifications:
  • 44-46x Usable Disk Drives
  • 0-2x LogZilla 18GB SSDs
  • Dual Quad-Core Opteron
  • 32GB/64GB RAM
  • 4x 1 Gigabit Ethernet Ports
  • 3x PCI-E Slots per Node
Options:
  • 1Gb-E and 10 Gb-E Network Interface Cards
  • FC/SCSI HBA Options for Backup/Restore
The 7210 is the ultimate dense storage pod! In combination with the 44TB Storage and the LogZilla write acceleration the system can provide up to 780MB/sec throughput! All of this in only 4u Rack Space!

Sun Storage 7410 Unified Storage System

T7410_Single_Node.pngThe 7410 is our highly available and performant Unfied Storage System. The 7410 System supports two configurations, a single node and a 2-node cluster for high availability. Each configuration has three levels, an Entry, Mid and High level, where the main differences are in computer power. Here is an overview of the hardware specifications:
  • Up to 576x Usable Disk Drives
  • Up to four Quad-Core Opteron per Node
  • Up to 4x LogZilla 18GB SSDs per Node
  • Up to 6x ReadZilla 100GB SSDs per Node
  • up to 128GB RAM per Node
  • 4x 1 Gigabit Ethernet Ports per Node
  • 6x PCI-E Slots per Node
Options:
  • 1Gb-E and 10 Gb-E Network Interface Cards
  • FC/SCSI HBA Options for Backup/Restore
T7410_Dual_Node.pngHave you ever seen a storage system that had 128GB Cache per Controller? We go even further by adding 600GB L2ARC Cache! So in fact if you go for the big cluster, you will have 256GB L1ARC Cache and 600GB L2ARC Cache. Again this is where we start today, imagine how much cache we will have in the future.

The 7410 is based on compute nodes (Heads) and storage nodes (JBODs). In regards to compute power you have 16 cores per head to do all storage and file system related work. In a clustered configuration you will have 32 cores that can perform in parallel (active/active)! The heads together have therefore a theoretical IO capability of more than 1.6 Mio IO/s per second!

A storage node is a 4u rack mountable chassis that can hold up to 24 disks. You can attach up to 24x storage nodes to this system which will give you a total of 576 disk drives.

The Sun Storage 7410 implements a true ZFS Hybrid Storage Pool with support for Flash-memory devices for acceleration of Reads (100GB Read Flash Accelerator, aka Readzilla) and Writes (18GB Write Flash Accelerator, Logzilla). Multiple configurations are provided on both the node configuration and the expansion array to accommodate the most demanding customer application performance requirements. You can find more details about the SSD Integration bellow in the feature section.

Extraordinary Features

Now as we have seen what hardware features the three Unified Storage Systems have, I wold like to go a bit deeper into the software features. These are in fact the features that make this products so unique and interesting!

SSD Integration / Hybrid Storage Pools

The Sun Storage 7000 system uses a Flash Hybrid Storage Pool design, which is composed of optional Flash-memory devices for acceleration of reads and writes, low-power and high-capacity enterpriseclass SATA disks, and DRAM memory. All these components are managed transparently as a single data hierarchy, with automated data placement by the file system. In the Storage 7410 model, both Write Flash Accelerator (write-optmized SSD, aka LogZilla) and Read Flash Accelerator (read-optimized SSD, aka ReadZille) are used to deliver superior performance and capacity at lower cost and energy consumption than competitive solutions. The Storage 7210 currently implements only write-optimized SSD, and the Storage 7110 does not currently implement this design.

ZFS provides two dimensions for adding flash memory to the file system stack, and improve overall system performance: the L2ARC (Level 2 ARC) for random reads, and the ZIL (ZFS Intent Log) for writes. The L2ARC (ARC is the ZFS main memory cache in DRAM) sits in between memory cache and disk drives and extends the main memory cache to improve read performance. The ZFS Intent Log uses Write-Flash SSD disks as log devices to improve write performance.

The main reason why we have chosen different SSDs (ReadZilla, WriteZilla) lays on the fact that flash based SSDs are still quite expensive and have some limitations in how they write data. The WriteZilla SSDs have a more complex controller chip that can handle thousands of write IO/s, a bigger DRAM cache and a capacitor that assures that in case of a power outage no IO gets lost between DRAM and the flash chips. WriteZilla SSDs are therefore optimized on writes while the ReadZilla SSDs are optimized on read operations.

Realtime Analytics

g20_abr_feature1_zoom.pngRealtime Analytics is one of the coolest features in this product and was only possible because Solaris has DTrace builtin. The Sun Storage 7000 Systems are equipped with Dtrace Analytics, an advanced DTrace-based facility for server analytics. DTrace Analytics provides real-time analysis of the Storage 7000 System and of the enterprise network, from the storage system to the clients accessing the data. It is an advanced facility to graph a variety of statistics in real-time and record this data for later viewing. It has been designed for both long term monitoring and short term analysis. When needed, it makes use of DTrace to dynamically create custom statistics, which allows different layers of the operating system stack to be analyzed in detail.

g20_abr_feature2_zoom.pngAnalytics has been designed around an effective performance analysis technique called drill-down analysis. This involves checking high level statistics first, and to focus on finer details based on findings so far. This quickly narrows the focus to the most likely areas.

So how does this work?

You may discover a throughput problem on your network. By selecting the interface that causes you some headache, you can drill down by protocol and even deeper onto the NFS client that causes the high load. Well we don't stop here and can drill down further to figure out what kind of files the nfs client is accessing at what latency, etc. DTrace Analytics creates datasets as you are drilling down. These datasets can be stored and reused at a later time. The analytic data is not discarded - if an appliance has been running for two years, you can zoom down to by-second views for any time in the previous two years for your archived datasets. The data is stored on a compressed file system and can be easily monitored. You can destroy datasets on demand or export them as CSV.

Other Features

The Unified Storage Systems have a lot of other features which I will cover in short.

Data Compression

Data compression is useful because it helps reduce the consumption of expensive resources, such as hard disk space or transmission bandwidth. The Sun Storage 7000 System software supports 4 levels of data compression, LZJB and 3 levels of GZIP. Shares can optionally compress data before writing to the storage pool. This allows for much greater storage utilization at the expense of increased CPU utilization. In the Sun Storage 7000 family, by default, no compression is done. If the compression does not yield a minimum space savings, it is not committed to disk to avoid unnecessary decompression when reading back the data.

Snapshots

A snapshot is a read-only copy of a file system or volume. Snapshots can be created almost instantly, and initially consume no additional disk space within the pool. When data within the active dataset change, the snapshot consumes disk space by continuing to reference the old data and so prevents the space from being freed. Snapshots are the base for replication and just-in-time backup.

Remote Replication

The Sun Storage 7000 Remote Replication can be used to create a copy of a filesystem, group of filesystems or LUNs from any Storage 7000 System to another 7000 system at a remote location through an interconnecting TCP/IP network that is responsible for propagating the data between them. Replication transfers the data and metadata in a project and its component shares either at discrete, point in time snapshots or continuously. Discrete replication can be initiated manually or occur on a schedule of your own creation. With continuous replication, data is streamed asynchronously to the remote appliance as it's modified locally at the granularity of storage transactions to ensure data consistency. In both cases, data transmitted between appliances is encrypted using SSL.

iSCSI Block Level Access

The Sun Storage 7000 family of products act as a iSCSI target for several iSCSI hardware and software initiators. When you configure a LUN on the appliance you can specify that it is an Internet Small Computer System Interface (iSCSI) target. The service supports discovery, management, and configuration using the iSNS protocol. The iSCSI service supports both unidirectional (target authenticates initiator) and bidirectional (target and initiator authenticate each other) authentication using CHAP. Additionally, the service supports CHAP authentication data management in a RADIUS database. You can even do thin provisioning with iSCSI Luns. Means they grow on demand.

Virus Scan

This feature allows the Storage 7000 family to be configured as a client of an antivirus scan engine. The Virus Scan service will scan for viruses at the filesystem level. When a file is accessed from any protocol, the Virus Scan service will first scan the file, and both deny access and quarantine the file if a virus is found. Once a file has been scanned with the latest virus definitions, it is not rescanned until it is next modified.

NDMP Backup and Restore

Backup and restore is one of the primary goals of enterprise storage management. Backup and restores should be in a timely, secure, and cost effective manner over enterprise wide operating systems. Companies need high performance backup and the ability to back up data to local media devices. While the data itself may be distributed throughout the enterprise, its cataloging and control must be centralized. The emergence of network-attached storage and dedicated file servers makes storage management more challenging. Network Data Management Protocol (NDMP) recognizes that these issues must be addressed. NDMP is an opportunity to provide truly enterprise-wide heterogeneous storage management solutions - permitting platforms to be driven at a departmental level and backup at the enterprise level.

The Sun Storage 7000 Systems support NDMP v3 and v4

Phone-Home of Telemetry for all Software and Hardware Issues

Phone-home provides automated case opening when failures are detected in the system. This assures faster time to resolutions and reduces the time to figure out what the problem might be.

End-to-End Data Integrity and self-healing mechanisms

The Sun Storage 7000 systems include FMA (Failure Management Architecture) which provides the capability to detect and take faulty hardware components offline in order to prevent system disruption. In addition, to avoid accidental data corruption, the ZFS file system provides memory-based end-to-end data and metadata checksumming with self-healing capabilities to fix potential issues. FMA combined with ZFS data integrity facilities, make the sun Storage 7000 the most comprehensive self-healing unified storage system.

Conclusion

What makes this system so screaming cool? It is simply the combination off all features, starting at the hardware with the SAS protocol, the incredibly high amount of caches, the integration of SSD technology going to the soft features like real time analysis, end-to-end data integrity, FMA (Fault Management Architecture), and finally its foundation on open source technology (OpenSolaris, ZFS, and many other open source projects) that assures future innovation. Features like, encryption, de-duplication and FC-target mode are on its way. And you know what, you will get them all at no additional license cost! That is what I call investment protection.

If you don't consider these Unified Storage Systems at your next IT investment, you are simply ignoring facts and may spent far too much money for a limited featured product.
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