X4-2 Exadata Announcement

These the differences with the new X4-2 just announced, along with a table comparing the differences.
1) Double the size of flashcache
2) Switch from 3tb drives to 4tb drives (HC)
3) More cpu cores
4) Increase in Infiniband throughput by using an Active-Active configuration
5) Automatic Flash compression on X3 and X4 systems (using the ACO option)

	x2	X3	X4
Database
Processesor	2 x Six-Core Intel Xeon® X5675 Processors (3.06 GHz)	2 x Eight-Core Intel Xeon®E5-2690 Processors (2.9 GHz)	2 X Twelve-Core Intel® Xeon® E5-2697 V2 Processors (2.7 GHz)
Memory	96G	128g/256g	256g
Disk controller	Disk Controller HBA with 512MB Batter Backed Write Cache	Disk Controller HBA with 512MB Batter Backed Write Cache	Disk Controller HBA with 512MB Batter Backed Write Cache
Internal disks	4 x 300 GB 10,000 RPM SAS Disks	4 x 300 GB 10,000 RPM Disks	4 x 600 GB 10,000 RPM Disks
Infiniband	2 x QDR (40Gb/s) Ports	2 x QDR (40Gb/s) Ports	2 x QDR (40Gb/s) Ports
Ethernet	2 x 10 Gb Ethernet Ports based on the Intel 82599 10GbE Controller	4 x 1/10 Gb Ethernet Ports (copper)	4 x 1/10 Gb Ethernet Ports (copper)
Ethernet	4 x 1 Gb Ethernet Ports	2 x 10 Gb Ethernet Ports (optical)	2 x 10 Gb Ethernet Ports (optical)
Full Rack	96 CPU cores and 768 gb memory for database processing (12 CPU cores and 96 GB memory per Database Server)	128 CPU cores and 1TB or  2 TB memory for database processing (16 CPU cores and 256 GB memory per Database Server)	192 CPU cores and 2TB memory for database processing (24 CPU cores and up to 512 GB memory per Database Server)
Storage Cells
CPU	2 x Six-Core Intel® Xeon® L5640 (2.26 GHz) Processors	2 x Six-Core Intel® Xeon® E5-2630L (2.0 GHz processors)	2 x Six-Core Intel® Xeon® E5-2630 v2 (2.6 GHz processors)
Memory	24 GB	64 GB	96 GB
HC (High Capacity)
Disk Bandwidth¹	Up to 18 GB/second of uncompressed disk bandwidth	Up to 18 GB/second of uncompressed disk bandwidth	Up to 20 GB/second of uncompressed disk bandwidth
Flash Bandwidth¹	Up to 68 GB/second of uncompressed Flash data bandwidth	Up to 93 GB/second of uncompressed Flash data bandwidth	Up to 100 GB/second of uncompressed Flash data bandwidth
Disk IOPS ²	Up to 28,000 Database Disk IOPS	Up to 28,000 Database Disk IOPS	Up to 32,000 Database Disk IOPS
Flash read IOPS ²	Up to 1,500,000 Database Flash IOPS	Up to 1,500,000 Database Flash IOPS	Up to 2,660,000 Database Flash IOPS
Flash write IOPS³	N/A	Up to 1,000,000 Database Flash IOPS	Up to 1,680,000 Database Flash IOPS
Flash Data Capacity (raw)⁴	5.3 TB Exadata Smart Flash Cache	22.4 TB	44.8 TB
Disk Data capacity (raw)⁵	504 TB of raw disk data capacity	504 TB	672 TB
Disk Data capacity (Usable)⁶	Up to 224 TB of uncompressed usable capacity	224 TB	300 TB
HP (High Performance)
Disk Bandwidth¹	Up to 25 GB/second of uncompressed disk bandwidth	Up to 25 GB/second of uncompressed disk bandwidth	Up to 24 GB/second of uncompressed disk bandwidth
Flash Bandwidth¹	Up to 75 GB/second of uncompressed Flash data bandwidth	Up to 100 GB/second of uncompressed Flash data bandwidth	Up to 100 GB/second of uncompressed Flash data bandwidth
Disk IOPS ²	Up to 50,000 Database Disk IOPS	Up to 50,000 Database Disk IOPS	Up to 50,000 Database Disk IOPS
Flash read IOPS ²	Up to 1,500,000 Database Flash IOPS	Up to 1,500,000 Database Flash IOPS	Up to 2,660,000 Database Flash IOPS
Flash write IOPS³	N/A	Up to 1,000,000 Database Flash IOPS	Up to 1,680,000 Database Flash IOPS
Flash Data Capacity (raw)⁴	5.3 TB Exadata Smart Flash Cache	22.4 TB	44.8 TB
Disk Data capacity (raw)⁵	100 TB of raw disk data capacity	100 TB	200 TB
Disk Data capacity (Usable)⁶	Up to 45 TB of uncompressed usable capacity	45 TB	90 TB
	¹Bandwidth is peak physical scan bandwidth achieved running SQL, assuming no database compression. Effective user data bandwidth is higher when database compression is used.
	²Based on 8K IO requests running SQL. Note that the IO size greatly affects Flash IOPS. Others quote IOPS based on 2K or smaller IOs and are not relevant for databases.
	³Based on 8K IO requests running SQL. Flash write I/Os measured at the storage servers after ASM mirroring. Database writes will usually issue multiple storage IOs to maintain redundancy.
	⁴Raw capacity is measured in standard disk drive terminology with 1 GB = 1 billion bytes. Capacity is measured using normal powers of 2 space terminology with 1 TB = 1024 * 1024 * 1024 * 1024 bytes. Actual formatted capacity is less.
	⁵Raw capacity is measured in standard disk drive terminology with 1 GB = 1 billion bytes. Capacity is measured using normal powers of 2 space terminology with 1 TB = 1024 * 1024 * 1024 * 1024 bytes. Actual formatted capacity is less.
	⁶Actual space available for a database after mirroring (ASM normal redundancy) while also providing adequate space (one disk on Quarter and Half Racks and two disks on a Full Rack) to reestablish the mirroring protection after a disk failure in the normal redundancy case.

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