Robert T Novak

US Patent:

7453825, Nov 18, 2008

Filed:

Dec 13, 2004

Appl. No.:

11/011413

Inventors:

Dileep Sivasankaran - Fremont CA, US
Frank S. Madren - Los Gatos CA, US
Robert E. Novak - Santa Clara CA, US

Assignee:

Garrettcom, Inc. - Fremont CA

International Classification:

H04L 12/28

US Classification:

370255, 370216, 709239, 709242

Abstract:

One embodiment disclosed relates to a method of operating a network switch to provide wireless redundancy in a network. A keep-alive control packet is periodically transmitting over a wireless link, wherein the keep-alive control packet has a destination MAC address being that of the other switch on the other side of the wireless link, and wherein the keep-alive control packet is specifically designated to be identified as a keep-alive type packet. The specific designation may be implemented by having a source MAC address comprising a predetermined reserved MAC address. A key portion of one embodiment is the detection of the nearest neighbor in a point-to-point connection without confusion with another device elsewhere in the network. Other embodiments are also disclosed.

US Patent:

20090223836, Sep 10, 2009

Filed:

Apr 21, 2009

Appl. No.:

12/427194

Inventors:

Leta Yar-Li Woo - Oakland CA, US
Robert S. Glass - Livermore CA, US
Robert F. Novak - Farmington Hills MI, US
Jacobus Hendrick Visser - Farmington Hills MI, US
Erica Perry Murray - Barrington IL, US
Louis Peter Martin - San Ramon CA, US

International Classification:

G01N 27/26

US Classification:

2057855, 204424

Abstract:

An electrochemical sensor system for monitoring emissions includes locating first and second electrodes in a position to sense the emissions. At least one of the first and second electrodes is made of a dense electrode material. An ion-conductor material that acts as an electrolyte is operatively connected to the first and second electrodes. The first electrode is excited at a frequency f, A response is received from the first electrode at frequency f. A second signal is received base on the emissions and a response is produced indicating the emissions.

US Patent:

20160188591, Jun 30, 2016

Filed:

Aug 8, 2015

Appl. No.:

14/821693

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

Nexenta Systems, Inc. - Santa Clara CA

International Classification:

G06F 17/30

Abstract:

The present disclosure provides systems and methods for Key-Value-Tuple-encoded (KVT-encoded) object storage. In accordance with an embodiment of the invention, chunks of objects, storing payload data or metadata, are persistently stored by servers using KVT-encoded storage. Furthermore, the KVT encoding may be applied to advantageously re-structure content within a distributed object storage cluster, especially for object storage systems that allow payload references to be cached extensively. For such systems, it is of considerable value to honor (use as valid) existing chunk references after the underlying content has been re-structured. Further, the KVT encoding taught herein is completely compatible with a fully-distributed object storage cluster. One embodiment relates to a storage server that includes a persistent storage module that provides a key-value application programming interface that encodes multiple key-value-tuple (KVT) entries for one chunk. Other embodiments, aspects and features are also disclosed.

US Patent:

20160191250, Jun 30, 2016

Filed:

Aug 8, 2015

Appl. No.:

14/821698

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

Nexenta Systems, Inc. - Santa Clara CA

International Classification:

H04L 9/32
H04L 29/08

Abstract:

The present disclosure provides systems and methods for sharding objects stored in a distributed storage system. Such sharding may be advantageously utilized for an object that stores a collection of key-value records and for otherwise encoded objects. The object sharding techniques disclosed herein advantageously enable a read-modify-write process at the storage server level. One embodiment disclosed herein provides a method of creating a new chunk by modifying a payload of an existing chunk at the storage server level in a distributed object storage system. The method includes validating the new chunk at the gateway server. Other embodiments, aspects and features are also disclosed.

US Patent:

20160191508, Jun 30, 2016

Filed:

Aug 8, 2015

Appl. No.:

14/821694

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

Nexenta Systems, Inc. - Santa Clara CA

International Classification:

H04L 29/06
G06F 3/06

Abstract:

The present disclosure provides systems and methods for sharding objects stored in a distributed storage system. In accordance with one embodiment disclosed herein, a block sharding technique is used. Block sharding is an advantageously efficient technique when dealing with random access objects, such as virtual disk drives or “volumes”. One embodiment disclosed herein provides a method of performing a delta edit of a named object stored in a distributed storage system in which a payload of the named object is stored in block shards defined by block-shard chunk references. The block shards store non-overlapping byte ranges of the payload of the named object. Another embodiment disclosed herein relates to a method of retrieving a portion of a named object stored in a distributed object storage system. Other embodiments, aspects and features are also disclosed.

US Patent:

20160191509, Jun 30, 2016

Filed:

Aug 8, 2015

Appl. No.:

14/821697

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

NEXENTA SYSTEMS, INC. - Santa Clara CA

International Classification:

H04L 29/06
G06F 12/14

Abstract:

The present disclosure also provides systems and methods for sharding objects stored in a distributed storage system. In accordance with one embodiment disclosed herein, a key sharding technique is used. Key sharding is an advantageously efficient technique when dealing with an object containing a collection of key-value records. In accordance with an embodiment of the invention, referenced chunks identified by the key shards may each store a subset of the collection of the key-value records, and the key-value records in the subset have key hashes that have a range of matching bits in common. One embodiment disclosed herein provides a method of performing a delta edit of a named object stored in a distributed storage system in which a payload of the named object is stored in key shards. Other embodiments, aspects and features are also disclosed.

US Patent:

20140204940, Jul 24, 2014

Filed:

Dec 3, 2013

Appl. No.:

14/095839

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

Nexenta Systems, Inc. - Santa Clara CA

International Classification:

H04L 12/18

US Classification:

370390

Abstract:

Embodiments disclosed herein provide advantageous methods and systems that use multicast communications via unreliable datagrams sent on a protected traffic class. These methods and systems provide effectively reliable multicast delivery while avoiding the overhead associated with point-to-point protocols. Rather than an exponential scaling of point-to-point connections (with expensive setup and teardown of the connections), the traffic from one server is bounded by linear scaling of multicast groups. In addition, the multicast rendezvous disclosed herein creates an edge-managed flow control that accounts for the dynamic state of the storage servers in the cluster, without needing centralized control, management or maintenance of state. This traffic shaping avoids the loss of data due to congestion during sustained oversubscription. Other embodiments, aspects and features are also disclosed.

US Patent:

20140204941, Jul 24, 2014

Filed:

Dec 3, 2013

Appl. No.:

14/095843

Inventors:

- Santa Clara CA, US
Robert E. NOVAK - Union City CA, US
Alexander AIZMAN - Santa Clara CA, US

Assignee:

Nexenta Systems, Inc. - Santa Clara CA

International Classification:

H04L 12/18

US Classification:

370390

Abstract:

Embodiments disclosed herein provide advantageous methods and systems that use multicast communications via unreliable datagrams sent on a protected traffic class. These methods and systems provide effectively reliable multicast delivery while avoiding the overhead associated with point-to-point protocols. Rather than an exponential scaling of point-to-point connections (with expensive setup and teardown of the connections), the traffic from one server is bounded by linear scaling of multicast groups. In addition, the multicast rendezvous disclosed herein creates an edge-managed flow control that accounts for the dynamic state of the storage servers in the cluster, without needing centralized control, management or maintenance of state. This traffic shaping avoids the loss of data due to congestion during sustained oversubscription. Other embodiments, aspects and features are also disclosed.