WW Last Mile EndUser Instrumentation Data Aladdin A

WW Last Mile End-User Instrumentation Data Aladdin A. Nassar Hotmail & Windows Live Perf Champ Hotmail, Microsoft

The New Hotmail – Inbox

Hotmail’s Scale § 1. 3 Billion accounts ~ 600 Million active users § 50 Billion page views / month § 21 Billion e-mails Read / month § 2. 5 Billion e-mails Sent / month § Move 5. 5 PB of data / month around the internet

What is CSI Perf? § Built-in WW Last Mile End-User Perf § Global On. Click event handler § Shared Control across WL network § BI/CI + Perf instrumentation

What is CSI Perf? … § Sampling Frequency § Cookies – works for Postbacks / Ajax § Server-Side Headers § Sends information through QS

CSI Perf Measures § Timings: - Time to Glass - Page Load Time - Between any 2 points § Network Latency § Bandwidth § Cached / Uncached Detection

CSI Perf is aware of § Date/Time § Transaction (From / To) § User’s Country § Data Center, Cluster, SKU § OS § Browser

How CSI Perf measures … § Network Latency: - Tiny uncahed HTTP “ping” § Bandwidth: - Time to load a clustered image (PLT 1/2) - Read / Send E-mails (Uncompressed) - Upload Attachments (Compressed)

WW Network Latencies (NL) Source: CSI Perf 500 Million Data Points from Jan 2009 – June 2010

WW Bandwidths (BW) Source: CSI Perf 3. 5 Billion Data Points from Jan 2009 – June 2010

WW Page Load Time – Composite Source: CSI Perf 7 Billion Data Points from Jan 2009 – June 2010

WW Perf Index = BW + NL + PLT

Countries Governed by Bandwidth Countries Governed by Network Latencies

Which Governs NL or BW?

WW DNS & TCP Source: Bing Toolbar 950 Million Data Points from May/June 2010

WW TCP vs. TTFB Source: Bing Toolbar 950 Million Data Points from May/June 2010

Composite PLT Ratio by Browser Source: CSI Perf 6. 7 Billion Data Points from Jan 2009 – June 2010 It turns out Safari fires the Page Onload event earlier than other browsers

Composite PLT Ratio by OS Source: CSI Perf 8. 3 Billion Data Points from Jan 2009 – June 2010

WW Last Mile End-User Instrumentation Data Aladdin A. Nassar Hotmail & Windows Live Perf Champ Hotmail, Microsoft