Abstract: Techniques for implementing zone redundant computing services in distributed computing systems are described herein. In one embodiment, a computing device is configured to query a database in a first availability zone for a list of computing services corresponding to a user account and provided by servers in a second availability zone different than the first availability zone. The computing device can then selects one or more computing services provided by the servers in the second availability zone from the queried list of computing services and transmit an instruction to the servers in the second availability zone for performing the requested data operation.

Abstract: Techniques for implementing zone redundant computing services in distributed computing systems are described herein. In one embodiment, a computing device is configured to query a database in a first availability zone for a list of computing services corresponding to a user account and provided by servers in a second availability zone different than the first availability zone. The computing device can then selects one or more computing services provided by the servers in the second availability zone from the queried list of computing services and transmit an instruction to the servers in the second availability zone for performing the requested data operation.

Abstract: A system and method for modifying a system property, such as a system time. A time offset may be passed between computing devices by including it in a request message. On a computing device, the time offset may be stored in an apartment corresponding to the received request. The apartment may be stored in thread logical data, accessible to any thread that performs actions related to the request. The apartment with the time offset may be passed between computing devices by including it in a request message. On a particular device, the apartment and time offset may be retrieved to determine an adjusted time. The system may be used by a client to perform tests or to recover from failures without disturbing the system time. System properties other than system time may be adjusted with the mechanisms described.

Abstract: An invention is disclosed for scalable billing usage data storage. In an embodiment, users are billed on a monthly cycle. The data storage is divided into two partitions. First, the data is divided into an “L1” partition for each day of the billing cycle. Within each L1 partition, data is further divided into “L2” partitions based on a customer's subscription ID. Through such partitioning, each customer's billing usage data for a billing cycle is entirely contained within a single L2 partition, and that data may be retrieved without spanning partitions.