Accessing multiple virtual devices

Patent metadata

Field	Value
Publication number	US-9411535-B1
Application number	US-201514670909-A
Country	US
Kind code	B1
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

In one aspect, a method includes receiving a first I/O at a kernel interface using a pseudo data storage system, writing the first I/O to a first virtual device on a datastore, receiving a second I/O at the kernel interface using the pseudo data storage system and writing the second I/O to a second virtual device on the datastore.

First claim

What is claimed is:

1. A method comprising:
discovering devices on a data store comprising a first virtual device and a second virtual device;
receiving an inquiry from a virtual data protection appliance;
responding to the query by providing information on a pseudo data storage system;
sending discovered devices to the virtual data protection appliance;
receiving a first input/output (I/O) request at a kernel interface using the pseudo data storage system;
writing the first I/O request to a first journal, used in a data replication process, in a first virtual device on the datastore;
receiving a second I/O request at the kernel interface using the pseudo data storage system; and
writing the second I/O request to a second virtual device on the datastore, wherein the second storage device is separate from the first storage device.

2. The method of claim 1 , further comprising attaching the pseudo data storage system to a virtual data protection appliance.

3. The method of claim 1 , wherein receiving a first I/O request at a kernel interface using the pseudo data storage system comprises: intercepting a command to the pseudo data storage system; and stripping designation information from the command before the command is forwarded to the pseudo data storage system.

4. An apparatus, comprising:
electronic hardware circuitry configured to:
discover devices on a data store comprising a first virtual device and a second virtual device;
receive an inquiry from a virtual data protection appliance;
respond to the query by providing information on a pseudo data storage system;
send discovered devices to the virtual data protection appliance;
receive a first input/output (I/O) request at a kernel interface using the pseudo data storage system;
write the first I/O request to a first journal, used in a data replication process, in a first virtual device on the datastore;
receive a second I/O request at the kernel interface using the pseudo data storage system; and
write the second I/O request to a second virtual device on the datastore, wherein the second storage device is separate from the first storage device.

5. The apparatus of claim 4 , wherein the electronic hardware circuitry comprises at least one of a processor, a memory, a programmable logic device or a logic gate.

6. The apparatus of claim 4 , further comprising circuitry to attach the pseudo data storage device to a virtual data protection appliance.

7. The apparatus of claim 4 , wherein the circuitry to receive a first I/O at a kernel interface using a pseudo data storage system comprises circuitry to:
intercept a command to the pseudo data storage system; and
strip designation information from the command before the command is forwarded to the pseudo data storage system.

8. An article comprising:
a non-transitory computer-readable medium that stores computer-executable instructions, the instructions causing a machine to:
discover devices on a data store comprising a first virtual device and a second virtual device;
receive an inquiry from a virtual data protection appliance;
respond to the query by providing information on a pseudo data storage system;
send discovered devices to the virtual data protection appliance;
receive a first input/output (I/O) request at a kernel interface using the pseudo data storage system;
write the first I/O request to a first journal, used in a data replication process, in a first virtual device on the datastore;
receive a second I/O request at the kernel interface using the pseudo data storage system; and
write the second I/O request to a second virtual device on the datastore, wherein the second storage device is separate from the first storage device.

9. The article of claim 8 , further comprising instructions causing the machine to attach the pseudo data storage device to a virtual data protection appliance.

10. The article of claim 8 , wherein the instructions causing the machine to receive a first I/O at a kernel interface using a pseudo data storage system comprises instructions causing the machine to:
intercept a command to the pseudo data storage system; and
strip designation information from the command before the command is forwarded to the pseudo data storage system.

Assignees

• Emc Corp

Inventors

• Shemer Jehuda
• Cohen Saar
• Natanzon Assaf
• Solan Alex
• Cooper Ron
• Baruch Leehod

Classifications

• G06F11/1474

  in transactions (updating of structured data in databases G06F16/23) · CPC title

• G06F3/0617

  in relation to availability · CPC title

• G06F3/067 Primary

  Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS] · CPC title

• G06F2201/855

  Details of asynchronous mirroring using a journal to transfer not-yet-mirrored changes · CPC title

• G06F3/0608

  Saving storage space on storage systems · CPC title