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Advances, Systems and Applications

Journal of Cloud Computing Cover Image

Table 6 Characteristics of the Case Studies

From: Degrees of tenant isolation for cloud-hosted software services: a cross-case analysis

Aspect Case study 1 Case study 2 Case study 3
Research Aim To evaluate the degrees of isolation of multitenancy patterns for cloud-hosted continuous integration system To evaluate the degrees of isolation of multitenancy patterns for cloud-hosted version control system. To evaluate the degrees of isolation of multitenancy patterns for cloud-hosted bug tracking system
Target process Continuous integration Version control Bug tracking
GSD tool/plugin that can be used to simulate the process Hudson Subversion, FileSystem SCM Plugin (integrated in Hudson) Bugzilla
User-level Process investigated Automated Build Verification/Testing Check-in, Check-out, locking Bug creation with file attachment
Process simulated in JMeter sending HTTP/HTTPS request to continuous integration server sending an FTP download file and upload file request to a Version control repository sending an JDBC Request(an SQL query) to a database, invoking external JMeter APIs and Java classes via BeanShell
Developer community Eclipse Foundation Apache Software Foundation Mozilla Foundation
Implementation Language Java Python, Java Perl, Java
Mechanism for Customization and Extension Hudson plug-in using Hudson HPI tool Hook scripts or any program triggered by some repository event (e.g., pre-hooks which run in advance of a repository operation) Bugzilla Extensions Hooks
Storage/DBMS used (Back end) MySQL Postgree SQL, Berkley DB MySQL, PostgreSQL
Implementation of Tenant Isolation (based on COMITRE) Easy to implement due to Java programming language familiarity Fairly simple to implement but files permissions could be an issue Difficult and challenging due to existing database restrictions/constraints
Key implementation challenges Insufficient system resources (e.g., memory) File permission errors Restrictions of database schema (e.g., file size, maximum open connections)