实例存储生命周期 Instance store

Instance store 实例存储生命周期

您只能在启动实例时指定实例的实例存储卷。您无法将实例存储卷与一个实例分离并将该卷附加到另一个实例。

实例存储内的数据仅在与关联的实例的生命周期内保留。如果实例重启 (无论是故意还是意外)，实例存储内的数据都会保留下来。然而，在以下任一情况下，实例存储中的数据会丢失：

• 底层磁盘驱动器发生故障

• 实例停止

• 实例终止

因此，切勿依赖实例存储来存储珍贵且需要长期保存的数据。应使用更持久的数据存储，如 Amazon S3、Amazon EBS 或 Amazon EFS。

当您停止或终止一个实例时，将重置实例存储中的每个存储数据块。因此，无法通过另一实例的实例存储访问您的数据。

如果您从实例创建 AMI，则从此 AMI 中启动实例时，实例存储卷上的数据不能保存且不会出现在实例存储卷上。

下表列出了每种支持的实例类型可以使用的实例存储卷的数量、大小、类型和性能优化。有关实例类型的完整列表（包括仅 EBS 类型），请参阅 Amazon EC2 实例类型。

实例类型	实例存储卷	类型	需要初始化 *	TRIM Support**
c1.medium	1 x 350 GB	HDD	✔
c1.xlarge	4 x 420 GB (1.6 TB)	HDD	✔
c3.large	2 x 16 GB (32 GB)	SSD	✔
c3.xlarge	2 x 40 GB (80 GB)	SSD	✔
c3.2xlarge	2 x 80 GB (160 GB)	SSD	✔
c3.4xlarge	2 x 160 GB (320 GB)	SSD	✔
c3.8xlarge	2 x 320 GB (640 GB)	SSD	✔
c5d.large	1 x 50GB	NVMe SSD		✔
c5d.xlarge	1 x 100GB	NVMe SSD		✔
c5d.2xlarge	1 x 200GB	NVMe SSD		✔
c5d.4xlarge	1 x 400GB	NVMe SSD		✔
c5d.9xlarge	1 x 900GB	NVMe SSD		✔
c5d.18xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
cc2.8xlarge	4 x 840 GB (3.36 TB)	HDD	✔
cr1.8xlarge	2 x 120 GB (240 GB)	SSD	✔
d2.xlarge	3 x 2,000 GB (6 TB)	HDD
d2.2xlarge	6 x 2,000 GB (12 TB)	HDD
d2.4xlarge	12 x 2,000 GB (24 TB)	HDD
d2.8xlarge	24 x 2,000 GB (48 TB)	HDD
f1.2xlarge	1 x 470GB	NVMe SSD		✔
f1.4xlarge	1 x 940 GB	NVMe SSD		✔
f1.16xlarge	4 x 940 GB (3.76 TB)	NVMe SSD		✔
g2.2xlarge	1 x 60 GB	SSD	✔
g2.8xlarge	2 x 120 GB (240 GB)	SSD	✔
h1.2xlarge	1 x 2000 GB (2 TB)	HDD
h1.4xlarge	2 x 2000 GB (4 TB)	HDD
h1.8xlarge	4 x 2000 GB (8 TB)	HDD
h1.16xlarge	8 x 2000 GB (16 TB)	HDD
hs1.8xlarge	24 x 2,000 GB (48 TB)	HDD	✔
i2.xlarge	1 x 800 GB	SSD		✔
i2.2xlarge	2 x 800 GB (1.6 TB)	SSD		✔
i2.4xlarge	4 x 800 GB (3.2 TB)	SSD		✔
i2.8xlarge	8 x 800 GB (6.4 TB)	SSD		✔
i3.large	1 x 475 GB	NVMe SSD		✔
i3.xlarge	1 x 950 GB	NVMe SSD		✔
i3.2xlarge	1 x 1,900 GB	NVMe SSD		✔
i3.4xlarge	2 x 1,900 GB (3.8 TB)	NVMe SSD		✔
i3.8xlarge	4 x 1,900 GB (7.6 TB)	NVMe SSD		✔
i3.16xlarge	8 x 1,900 GB (15.2 TB)	NVMe SSD		✔
i3.metal	8 x 1,900 GB (15.2 TB)	NVMe SSD		✔
i3en.large	1 x 1,250 GB	NVMe SSD		✔
i3en.xlarge	1 x 2,500 GB	NVMe SSD		✔
i3en.2xlarge	2 x 2,500 GB (5 TB)	NVMe SSD		✔
i3en.3xlarge	1 x 7,500 GB	NVMe SSD		✔
i3en.6xlarge	2 x 7,500 GB (15 TB)	NVMe SSD		✔
i3en.12xlarge	4 x 7,500 GB (30 TB)	NVMe SSD		✔
i3en.24xlarge	8 x 7,500 GB (60 TB)	NVMe SSD		✔
m1.small	1 x 160 GB	HDD	✔
m1.medium	1 x 410 GB	HDD	✔
m1.large	2 x 420 GB (840 GB)	HDD	✔
m1.xlarge	4 x 420 GB (1.6 TB)	HDD	✔
m2.xlarge	1 x 420 GB	HDD	✔
m2.2xlarge	1 x 850 GB	HDD	✔
m2.4xlarge	2 x 840 GB (1.68 TB)	HDD	✔
m3.medium	1 x 4 GB	SSD	✔
m3.large	1 x 32 GB	SSD	✔
m3.xlarge	2 x 40 GB (80 GB)	SSD	✔
m3.2xlarge	2 x 80 GB (160 GB)	SSD	✔
m5ad.large	1 x 75GB	NVMe SSD		✔
m5ad.xlarge	1 x 150GB	NVMe SSD		✔
m5ad.2xlarge	1 x 300GB	NVMe SSD		✔
m5ad.4xlarge	2 x 300 GB (600 GB)	NVMe SSD		✔
m5ad.12xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
m5ad.24xlarge	4 x 900 GB (3.6 TB)	NVMe SSD		✔
m5d.large	1 x 75GB	NVMe SSD		✔
m5d.xlarge	1 x 150GB	NVMe SSD		✔
m5d.2xlarge	1 x 300GB	NVMe SSD		✔
m5d.4xlarge	2 x 300 GB (600 GB)	NVMe SSD		✔
m5d.12xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
m5d.24xlarge	4 x 900 GB (3.6 TB)	NVMe SSD		✔
m5d.metal	4 x 900 GB (3.6 TB)	NVMe SSD		✔
p3dn.24xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
r3.large	1 x 32 GB	SSD		✔
r3.xlarge	1 x 80 GB	SSD		✔
r3.2xlarge	1 x 160 GB	SSD		✔
r3.4xlarge	1 x 320 GB	SSD		✔
r3.8xlarge	2 x 320 GB (640 GB)	SSD		✔
r5ad.large	1 x 75GB	NVMe SSD		✔
r5ad.xlarge	1 x 150GB	NVMe SSD		✔
r5ad.2xlarge	1 x 300GB	NVMe SSD		✔
r5ad.4xlarge	2 x 300 GB (600 GB)	NVMe SSD		✔
r5ad.12xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
r5ad.24xlarge	4 x 900 GB (3.6 TB)	NVMe SSD		✔
r5d.large	1 x 75GB	NVMe SSD		✔
r5d.xlarge	1 x 150GB	NVMe SSD		✔
r5d.2xlarge	1 x 300GB	NVMe SSD		✔
r5d.4xlarge	2 x 300 GB (600 GB)	NVMe SSD		✔
r5d.12xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
r5d.24xlarge	4 x 900 GB (3.6 TB)	NVMe SSD		✔
r5d.metal	4 x 900 GB (3.6 TB)	NVMe SSD		✔
x1.16xlarge	1 x 1,920 GB	SSD
x1.32xlarge	2 x 1,920 GB (3.84 TB)	SSD
x1e.xlarge	1 x 120GB	SSD
x1e.2xlarge	1 x 240GB	SSD
x1e.4xlarge	1 x 480GB	SSD
x1e.8xlarge	1 x 960GB	SSD
x1e.16xlarge	1 x 1,920 GB	SSD
x1e.32xlarge	2 x 1,920 GB (3.84 TB)	SSD
z1d.large	1 x 75GB	NVMe SSD		✔
z1d.xlarge	1 x 150GB	NVMe SSD		✔
z1d.2xlarge	1 x 300GB	NVMe SSD		✔
z1d.3xlarge	1 x 450GB	NVMe SSD		✔
z1d.6xlarge	1 x 900GB	NVMe SSD		✔
z1d.12xlarge	2 x 900 GB (1.8 TB)	NVMe SSD		✔
z1d.metal	2 x 900 GB (1.8 TB)	NVMe SSD		✔

* 如果附加到特定实例的卷没有初始化，将会进行初始写入。